diff --git a/libs/checkpoint-postgres/langgraph/checkpoint/postgres/base.py b/libs/checkpoint-postgres/langgraph/checkpoint/postgres/base.py
index 1d54ec778..282eb2c86 100644
--- a/libs/checkpoint-postgres/langgraph/checkpoint/postgres/base.py
+++ b/libs/checkpoint-postgres/langgraph/checkpoint/postgres/base.py
@@ -226,13 +226,7 @@ def _load_metadata(self, metadata: dict[str, Any]) -> dict[str, Any]:
         return self.jsonplus_serde.loads(self.jsonplus_serde.dumps(metadata))
 
     def _dump_metadata(self, metadata) -> str:
-        serialized_metadata_type, serialized_metadata = self.jsonplus_serde.dumps_typed(
-            metadata
-        )
-        if serialized_metadata_type != "json":
-            raise TypeError(
-                f"Failed to properly serialize metadata -- expected 'json', got '{serialized_metadata_type}'"
-            )
+        serialized_metadata = self.jsonplus_serde.dumps(metadata)
         return serialized_metadata.decode()
 
     def get_next_version(self, current: Optional[str], channel: ChannelProtocol) -> str:
diff --git a/libs/checkpoint-postgres/poetry.lock b/libs/checkpoint-postgres/poetry.lock
index 520300e91..4116e8257 100644
--- a/libs/checkpoint-postgres/poetry.lock
+++ b/libs/checkpoint-postgres/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.2 and should not be changed by hand.
 
 [[package]]
 name = "annotated-types"
@@ -195,6 +195,63 @@ files = [
 [package.extras]
 test = ["pytest (>=6)"]
 
+[[package]]
+name = "h11"
+version = "0.14.0"
+description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "h11-0.14.0-py3-none-any.whl", hash = "sha256:e3fe4ac4b851c468cc8363d500db52c2ead036020723024a109d37346efaa761"},
+    {file = "h11-0.14.0.tar.gz", hash = "sha256:8f19fbbe99e72420ff35c00b27a34cb9937e902a8b810e2c88300c6f0a3b699d"},
+]
+
+[[package]]
+name = "httpcore"
+version = "1.0.5"
+description = "A minimal low-level HTTP client."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "httpcore-1.0.5-py3-none-any.whl", hash = "sha256:421f18bac248b25d310f3cacd198d55b8e6125c107797b609ff9b7a6ba7991b5"},
+    {file = "httpcore-1.0.5.tar.gz", hash = "sha256:34a38e2f9291467ee3b44e89dd52615370e152954ba21721378a87b2960f7a61"},
+]
+
+[package.dependencies]
+certifi = "*"
+h11 = ">=0.13,<0.15"
+
+[package.extras]
+asyncio = ["anyio (>=4.0,<5.0)"]
+http2 = ["h2 (>=3,<5)"]
+socks = ["socksio (==1.*)"]
+trio = ["trio (>=0.22.0,<0.26.0)"]
+
+[[package]]
+name = "httpx"
+version = "0.27.2"
+description = "The next generation HTTP client."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "httpx-0.27.2-py3-none-any.whl", hash = "sha256:7bb2708e112d8fdd7829cd4243970f0c223274051cb35ee80c03301ee29a3df0"},
+    {file = "httpx-0.27.2.tar.gz", hash = "sha256:f7c2be1d2f3c3c3160d441802406b206c2b76f5947b11115e6df10c6c65e66c2"},
+]
+
+[package.dependencies]
+anyio = "*"
+certifi = "*"
+httpcore = "==1.*"
+idna = "*"
+sniffio = "*"
+
+[package.extras]
+brotli = ["brotli", "brotlicffi"]
+cli = ["click (==8.*)", "pygments (==2.*)", "rich (>=10,<14)"]
+http2 = ["h2 (>=3,<5)"]
+socks = ["socksio (==1.*)"]
+zstd = ["zstandard (>=0.18.0)"]
+
 [[package]]
 name = "idna"
 version = "3.7"
@@ -244,29 +301,30 @@ files = [
 
 [[package]]
 name = "langchain-core"
-version = "0.2.24"
+version = "0.3.0"
 description = "Building applications with LLMs through composability"
 optional = false
-python-versions = "<4.0,>=3.8.1"
+python-versions = "<4.0,>=3.9"
 files = [
-    {file = "langchain_core-0.2.24-py3-none-any.whl", hash = "sha256:9444fc082d21ef075d925590a684a73fe1f9688a3d90087580ec929751be55e7"},
-    {file = "langchain_core-0.2.24.tar.gz", hash = "sha256:f2e3fa200b124e8c45d270da9bf836bed9c09532612c96ff3225e59b9a232f5a"},
+    {file = "langchain_core-0.3.0-py3-none-any.whl", hash = "sha256:bee6dae2366d037ef0c5b87401fed14b5497cad26f97724e8c9ca7bc9239e847"},
+    {file = "langchain_core-0.3.0.tar.gz", hash = "sha256:1249149ea3ba24c9c761011483c14091573a5eb1a773aa0db9c8ad155dd4a69d"},
 ]
 
 [package.dependencies]
 jsonpatch = ">=1.33,<2.0"
-langsmith = ">=0.1.75,<0.2.0"
+langsmith = ">=0.1.117,<0.2.0"
 packaging = ">=23.2,<25"
 pydantic = [
-    {version = ">=1,<3", markers = "python_full_version < \"3.12.4\""},
+    {version = ">=2.5.2,<3.0.0", markers = "python_full_version < \"3.12.4\""},
     {version = ">=2.7.4,<3.0.0", markers = "python_full_version >= \"3.12.4\""},
 ]
 PyYAML = ">=5.3"
 tenacity = ">=8.1.0,<8.4.0 || >8.4.0,<9.0.0"
+typing-extensions = ">=4.7"
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "1.0.8"
+version = "1.0.9"
 description = "Library with base interfaces for LangGraph checkpoint savers."
 optional = false
 python-versions = "^3.9.0,<4.0"
@@ -274,7 +332,8 @@ files = []
 develop = true
 
 [package.dependencies]
-langchain-core = ">=0.2.22,<0.3"
+langchain-core = ">=0.2.38,<0.4"
+msgpack = "^1.1.0"
 
 [package.source]
 type = "directory"
@@ -282,16 +341,17 @@ url = "../checkpoint"
 
 [[package]]
 name = "langsmith"
-version = "0.1.93"
+version = "0.1.120"
 description = "Client library to connect to the LangSmith LLM Tracing and Evaluation Platform."
 optional = false
 python-versions = "<4.0,>=3.8.1"
 files = [
-    {file = "langsmith-0.1.93-py3-none-any.whl", hash = "sha256:811210b9d5f108f36431bd7b997eb9476a9ecf5a2abd7ddbb606c1cdcf0f43ce"},
-    {file = "langsmith-0.1.93.tar.gz", hash = "sha256:285b6ad3a54f50fa8eb97b5f600acc57d0e37e139dd8cf2111a117d0435ba9b4"},
+    {file = "langsmith-0.1.120-py3-none-any.whl", hash = "sha256:54d2785e301646c0988e0a69ebe4d976488c87b41928b358cb153b6ddd8db62b"},
+    {file = "langsmith-0.1.120.tar.gz", hash = "sha256:25499ca187b41bd89d784b272b97a8d76f60e0e21bdf20336e8a2aa6a9b23ac9"},
 ]
 
 [package.dependencies]
+httpx = ">=0.23.0,<1"
 orjson = ">=3.9.14,<4.0.0"
 pydantic = [
     {version = ">=1,<3", markers = "python_full_version < \"3.12.4\""},
@@ -299,6 +359,79 @@ pydantic = [
 ]
 requests = ">=2,<3"
 
+[[package]]
+name = "msgpack"
+version = "1.1.0"
+description = "MessagePack serializer"
+optional = false
+python-versions = ">=3.8"
+files = [
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+    {file = "msgpack-1.1.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:74bed8f63f8f14d75eec75cf3d04ad581da6b914001b474a5d3cd3372c8cc27d"},
+    {file = "msgpack-1.1.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:914571a2a5b4e7606997e169f64ce53a8b1e06f2cf2c3a7273aa106236d43dd5"},
+    {file = "msgpack-1.1.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:c921af52214dcbb75e6bdf6a661b23c3e6417f00c603dd2070bccb5c3ef499f5"},
+    {file = "msgpack-1.1.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:d8ce0b22b890be5d252de90d0e0d119f363012027cf256185fc3d474c44b1b9e"},
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+    {file = "msgpack-1.1.0-cp39-cp39-win32.whl", hash = "sha256:f80bc7d47f76089633763f952e67f8214cb7b3ee6bfa489b3cb6a84cfac114cd"},
+    {file = "msgpack-1.1.0-cp39-cp39-win_amd64.whl", hash = "sha256:4d1b7ff2d6146e16e8bd665ac726a89c74163ef8cd39fa8c1087d4e52d3a2325"},
+    {file = "msgpack-1.1.0.tar.gz", hash = "sha256:dd432ccc2c72b914e4cb77afce64aab761c1137cc698be3984eee260bcb2896e"},
+]
+
 [[package]]
 name = "mypy"
 version = "1.11.0"
@@ -766,6 +899,7 @@ files = [
     {file = "PyYAML-6.0.1-cp311-cp311-win_amd64.whl", hash = "sha256:bf07ee2fef7014951eeb99f56f39c9bb4af143d8aa3c21b1677805985307da34"},
     {file = "PyYAML-6.0.1-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:855fb52b0dc35af121542a76b9a84f8d1cd886ea97c84703eaa6d88e37a2ad28"},
     {file = "PyYAML-6.0.1-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:40df9b996c2b73138957fe23a16a4f0ba614f4c0efce1e9406a184b6d07fa3a9"},
+    {file = "PyYAML-6.0.1-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:a08c6f0fe150303c1c6b71ebcd7213c2858041a7e01975da3a99aed1e7a378ef"},
     {file = "PyYAML-6.0.1-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:6c22bec3fbe2524cde73d7ada88f6566758a8f7227bfbf93a408a9d86bcc12a0"},
     {file = "PyYAML-6.0.1-cp312-cp312-musllinux_1_1_x86_64.whl", hash = "sha256:8d4e9c88387b0f5c7d5f281e55304de64cf7f9c0021a3525bd3b1c542da3b0e4"},
     {file = "PyYAML-6.0.1-cp312-cp312-win32.whl", hash = "sha256:d483d2cdf104e7c9fa60c544d92981f12ad66a457afae824d146093b8c294c54"},
diff --git a/libs/checkpoint-sqlite/poetry.lock b/libs/checkpoint-sqlite/poetry.lock
index 8d5dbe3af..22956ac85 100644
--- a/libs/checkpoint-sqlite/poetry.lock
+++ b/libs/checkpoint-sqlite/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.2 and should not be changed by hand.
 
 [[package]]
 name = "aiosqlite"
@@ -29,6 +29,28 @@ files = [
     {file = "annotated_types-0.7.0.tar.gz", hash = "sha256:aff07c09a53a08bc8cfccb9c85b05f1aa9a2a6f23728d790723543408344ce89"},
 ]
 
+[[package]]
+name = "anyio"
+version = "4.4.0"
+description = "High level compatibility layer for multiple asynchronous event loop implementations"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "anyio-4.4.0-py3-none-any.whl", hash = "sha256:c1b2d8f46a8a812513012e1107cb0e68c17159a7a594208005a57dc776e1bdc7"},
+    {file = "anyio-4.4.0.tar.gz", hash = "sha256:5aadc6a1bbb7cdb0bede386cac5e2940f5e2ff3aa20277e991cf028e0585ce94"},
+]
+
+[package.dependencies]
+exceptiongroup = {version = ">=1.0.2", markers = "python_version < \"3.11\""}
+idna = ">=2.8"
+sniffio = ">=1.1"
+typing-extensions = {version = ">=4.1", markers = "python_version < \"3.11\""}
+
+[package.extras]
+doc = ["Sphinx (>=7)", "packaging", "sphinx-autodoc-typehints (>=1.2.0)", "sphinx-rtd-theme"]
+test = ["anyio[trio]", "coverage[toml] (>=7)", "exceptiongroup (>=1.2.0)", "hypothesis (>=4.0)", "psutil (>=5.9)", "pytest (>=7.0)", "pytest-mock (>=3.6.1)", "trustme", "uvloop (>=0.17)"]
+trio = ["trio (>=0.23)"]
+
 [[package]]
 name = "certifi"
 version = "2024.7.4"
@@ -181,6 +203,63 @@ files = [
 [package.extras]
 test = ["pytest (>=6)"]
 
+[[package]]
+name = "h11"
+version = "0.14.0"
+description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "h11-0.14.0-py3-none-any.whl", hash = "sha256:e3fe4ac4b851c468cc8363d500db52c2ead036020723024a109d37346efaa761"},
+    {file = "h11-0.14.0.tar.gz", hash = "sha256:8f19fbbe99e72420ff35c00b27a34cb9937e902a8b810e2c88300c6f0a3b699d"},
+]
+
+[[package]]
+name = "httpcore"
+version = "1.0.5"
+description = "A minimal low-level HTTP client."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "httpcore-1.0.5-py3-none-any.whl", hash = "sha256:421f18bac248b25d310f3cacd198d55b8e6125c107797b609ff9b7a6ba7991b5"},
+    {file = "httpcore-1.0.5.tar.gz", hash = "sha256:34a38e2f9291467ee3b44e89dd52615370e152954ba21721378a87b2960f7a61"},
+]
+
+[package.dependencies]
+certifi = "*"
+h11 = ">=0.13,<0.15"
+
+[package.extras]
+asyncio = ["anyio (>=4.0,<5.0)"]
+http2 = ["h2 (>=3,<5)"]
+socks = ["socksio (==1.*)"]
+trio = ["trio (>=0.22.0,<0.26.0)"]
+
+[[package]]
+name = "httpx"
+version = "0.27.2"
+description = "The next generation HTTP client."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "httpx-0.27.2-py3-none-any.whl", hash = "sha256:7bb2708e112d8fdd7829cd4243970f0c223274051cb35ee80c03301ee29a3df0"},
+    {file = "httpx-0.27.2.tar.gz", hash = "sha256:f7c2be1d2f3c3c3160d441802406b206c2b76f5947b11115e6df10c6c65e66c2"},
+]
+
+[package.dependencies]
+anyio = "*"
+certifi = "*"
+httpcore = "==1.*"
+idna = "*"
+sniffio = "*"
+
+[package.extras]
+brotli = ["brotli", "brotlicffi"]
+cli = ["click (==8.*)", "pygments (==2.*)", "rich (>=10,<14)"]
+http2 = ["h2 (>=3,<5)"]
+socks = ["socksio (==1.*)"]
+zstd = ["zstandard (>=0.18.0)"]
+
 [[package]]
 name = "idna"
 version = "3.7"
@@ -230,29 +309,30 @@ files = [
 
 [[package]]
 name = "langchain-core"
-version = "0.2.24"
+version = "0.3.0"
 description = "Building applications with LLMs through composability"
 optional = false
-python-versions = "<4.0,>=3.8.1"
+python-versions = "<4.0,>=3.9"
 files = [
-    {file = "langchain_core-0.2.24-py3-none-any.whl", hash = "sha256:9444fc082d21ef075d925590a684a73fe1f9688a3d90087580ec929751be55e7"},
-    {file = "langchain_core-0.2.24.tar.gz", hash = "sha256:f2e3fa200b124e8c45d270da9bf836bed9c09532612c96ff3225e59b9a232f5a"},
+    {file = "langchain_core-0.3.0-py3-none-any.whl", hash = "sha256:bee6dae2366d037ef0c5b87401fed14b5497cad26f97724e8c9ca7bc9239e847"},
+    {file = "langchain_core-0.3.0.tar.gz", hash = "sha256:1249149ea3ba24c9c761011483c14091573a5eb1a773aa0db9c8ad155dd4a69d"},
 ]
 
 [package.dependencies]
 jsonpatch = ">=1.33,<2.0"
-langsmith = ">=0.1.75,<0.2.0"
+langsmith = ">=0.1.117,<0.2.0"
 packaging = ">=23.2,<25"
 pydantic = [
-    {version = ">=1,<3", markers = "python_full_version < \"3.12.4\""},
+    {version = ">=2.5.2,<3.0.0", markers = "python_full_version < \"3.12.4\""},
     {version = ">=2.7.4,<3.0.0", markers = "python_full_version >= \"3.12.4\""},
 ]
 PyYAML = ">=5.3"
 tenacity = ">=8.1.0,<8.4.0 || >8.4.0,<9.0.0"
+typing-extensions = ">=4.7"
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "1.0.8"
+version = "1.0.9"
 description = "Library with base interfaces for LangGraph checkpoint savers."
 optional = false
 python-versions = "^3.9.0,<4.0"
@@ -260,7 +340,8 @@ files = []
 develop = true
 
 [package.dependencies]
-langchain-core = ">=0.2.22,<0.3"
+langchain-core = ">=0.2.38,<0.4"
+msgpack = "^1.1.0"
 
 [package.source]
 type = "directory"
@@ -268,16 +349,17 @@ url = "../checkpoint"
 
 [[package]]
 name = "langsmith"
-version = "0.1.93"
+version = "0.1.120"
 description = "Client library to connect to the LangSmith LLM Tracing and Evaluation Platform."
 optional = false
 python-versions = "<4.0,>=3.8.1"
 files = [
-    {file = "langsmith-0.1.93-py3-none-any.whl", hash = "sha256:811210b9d5f108f36431bd7b997eb9476a9ecf5a2abd7ddbb606c1cdcf0f43ce"},
-    {file = "langsmith-0.1.93.tar.gz", hash = "sha256:285b6ad3a54f50fa8eb97b5f600acc57d0e37e139dd8cf2111a117d0435ba9b4"},
+    {file = "langsmith-0.1.120-py3-none-any.whl", hash = "sha256:54d2785e301646c0988e0a69ebe4d976488c87b41928b358cb153b6ddd8db62b"},
+    {file = "langsmith-0.1.120.tar.gz", hash = "sha256:25499ca187b41bd89d784b272b97a8d76f60e0e21bdf20336e8a2aa6a9b23ac9"},
 ]
 
 [package.dependencies]
+httpx = ">=0.23.0,<1"
 orjson = ">=3.9.14,<4.0.0"
 pydantic = [
     {version = ">=1,<3", markers = "python_full_version < \"3.12.4\""},
@@ -285,6 +367,79 @@ pydantic = [
 ]
 requests = ">=2,<3"
 
+[[package]]
+name = "msgpack"
+version = "1.1.0"
+description = "MessagePack serializer"
+optional = false
+python-versions = ">=3.8"
+files = [
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+    {file = "msgpack-1.1.0-cp38-cp38-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:e0856a2b7e8dcb874be44fea031d22e5b3a19121be92a1e098f46068a11b0870"},
+    {file = "msgpack-1.1.0-cp38-cp38-musllinux_1_2_aarch64.whl", hash = "sha256:471e27a5787a2e3f974ba023f9e265a8c7cfd373632247deb225617e3100a3c7"},
+    {file = "msgpack-1.1.0-cp38-cp38-musllinux_1_2_i686.whl", hash = "sha256:646afc8102935a388ffc3914b336d22d1c2d6209c773f3eb5dd4d6d3b6f8c1cb"},
+    {file = "msgpack-1.1.0-cp38-cp38-musllinux_1_2_x86_64.whl", hash = "sha256:13599f8829cfbe0158f6456374e9eea9f44eee08076291771d8ae93eda56607f"},
+    {file = "msgpack-1.1.0-cp38-cp38-win32.whl", hash = "sha256:8a84efb768fb968381e525eeeb3d92857e4985aacc39f3c47ffd00eb4509315b"},
+    {file = "msgpack-1.1.0-cp38-cp38-win_amd64.whl", hash = "sha256:879a7b7b0ad82481c52d3c7eb99bf6f0645dbdec5134a4bddbd16f3506947feb"},
+    {file = "msgpack-1.1.0-cp39-cp39-macosx_10_9_universal2.whl", hash = "sha256:53258eeb7a80fc46f62fd59c876957a2d0e15e6449a9e71842b6d24419d88ca1"},
+    {file = "msgpack-1.1.0-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:7e7b853bbc44fb03fbdba34feb4bd414322180135e2cb5164f20ce1c9795ee48"},
+    {file = "msgpack-1.1.0-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:f3e9b4936df53b970513eac1758f3882c88658a220b58dcc1e39606dccaaf01c"},
+    {file = "msgpack-1.1.0-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:46c34e99110762a76e3911fc923222472c9d681f1094096ac4102c18319e6468"},
+    {file = "msgpack-1.1.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:8a706d1e74dd3dea05cb54580d9bd8b2880e9264856ce5068027eed09680aa74"},
+    {file = "msgpack-1.1.0-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:534480ee5690ab3cbed89d4c8971a5c631b69a8c0883ecfea96c19118510c846"},
+    {file = "msgpack-1.1.0-cp39-cp39-musllinux_1_2_aarch64.whl", hash = "sha256:8cf9e8c3a2153934a23ac160cc4cba0ec035f6867c8013cc6077a79823370346"},
+    {file = "msgpack-1.1.0-cp39-cp39-musllinux_1_2_i686.whl", hash = "sha256:3180065ec2abbe13a4ad37688b61b99d7f9e012a535b930e0e683ad6bc30155b"},
+    {file = "msgpack-1.1.0-cp39-cp39-musllinux_1_2_x86_64.whl", hash = "sha256:c5a91481a3cc573ac8c0d9aace09345d989dc4a0202b7fcb312c88c26d4e71a8"},
+    {file = "msgpack-1.1.0-cp39-cp39-win32.whl", hash = "sha256:f80bc7d47f76089633763f952e67f8214cb7b3ee6bfa489b3cb6a84cfac114cd"},
+    {file = "msgpack-1.1.0-cp39-cp39-win_amd64.whl", hash = "sha256:4d1b7ff2d6146e16e8bd665ac726a89c74163ef8cd39fa8c1087d4e52d3a2325"},
+    {file = "msgpack-1.1.0.tar.gz", hash = "sha256:dd432ccc2c72b914e4cb77afce64aab761c1137cc698be3984eee260bcb2896e"},
+]
+
 [[package]]
 name = "mypy"
 version = "1.11.0"
@@ -651,6 +806,7 @@ files = [
     {file = "PyYAML-6.0.1-cp311-cp311-win_amd64.whl", hash = "sha256:bf07ee2fef7014951eeb99f56f39c9bb4af143d8aa3c21b1677805985307da34"},
     {file = "PyYAML-6.0.1-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:855fb52b0dc35af121542a76b9a84f8d1cd886ea97c84703eaa6d88e37a2ad28"},
     {file = "PyYAML-6.0.1-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:40df9b996c2b73138957fe23a16a4f0ba614f4c0efce1e9406a184b6d07fa3a9"},
+    {file = "PyYAML-6.0.1-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:a08c6f0fe150303c1c6b71ebcd7213c2858041a7e01975da3a99aed1e7a378ef"},
     {file = "PyYAML-6.0.1-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:6c22bec3fbe2524cde73d7ada88f6566758a8f7227bfbf93a408a9d86bcc12a0"},
     {file = "PyYAML-6.0.1-cp312-cp312-musllinux_1_1_x86_64.whl", hash = "sha256:8d4e9c88387b0f5c7d5f281e55304de64cf7f9c0021a3525bd3b1c542da3b0e4"},
     {file = "PyYAML-6.0.1-cp312-cp312-win32.whl", hash = "sha256:d483d2cdf104e7c9fa60c544d92981f12ad66a457afae824d146093b8c294c54"},
@@ -733,6 +889,17 @@ files = [
     {file = "ruff-0.6.2.tar.gz", hash = "sha256:239ee6beb9e91feb8e0ec384204a763f36cb53fb895a1a364618c6abb076b3be"},
 ]
 
+[[package]]
+name = "sniffio"
+version = "1.3.1"
+description = "Sniff out which async library your code is running under"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "sniffio-1.3.1-py3-none-any.whl", hash = "sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2"},
+    {file = "sniffio-1.3.1.tar.gz", hash = "sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc"},
+]
+
 [[package]]
 name = "tenacity"
 version = "8.5.0"
diff --git a/libs/checkpoint/langgraph/checkpoint/serde/jsonplus.py b/libs/checkpoint/langgraph/checkpoint/serde/jsonplus.py
index 2007ada62..139a26b67 100644
--- a/libs/checkpoint/langgraph/checkpoint/serde/jsonplus.py
+++ b/libs/checkpoint/langgraph/checkpoint/serde/jsonplus.py
@@ -19,6 +19,7 @@
 from typing import Any, Optional, Sequence
 from uuid import UUID
 
+import msgpack
 from langchain_core.load.load import Reviver
 from langchain_core.load.serializable import Serializable
 from zoneinfo import ZoneInfo
@@ -184,7 +185,10 @@ def dumps_typed(self, obj: Any) -> tuple[str, bytes]:
         elif isinstance(obj, bytearray):
             return "bytearray", obj
         else:
-            return "json", self.dumps(obj)
+            try:
+                return "msgpack", _msgpack_enc(obj)
+            except UnicodeEncodeError:
+                return "json", self.dumps(obj)
 
     def loads(self, data: bytes) -> Any:
         return json.loads(data, object_hook=self._reviver)
@@ -197,5 +201,275 @@ def loads_typed(self, data: tuple[str, bytes]) -> Any:
             return bytearray(data_)
         elif type_ == "json":
             return self.loads(data_)
+        elif type_ == "msgpack":
+            return msgpack.unpackb(data_, ext_hook=_msgpack_ext_hook)
         else:
             raise NotImplementedError(f"Unknown serialization type: {type_}")
+
+
+# --- msgpack ---
+
+EXT_CONSTRUCTOR_SINGLE_ARG = 0
+EXT_CONSTRUCTOR_POS_ARGS = 1
+EXT_CONSTRUCTOR_KW_ARGS = 2
+EXT_METHOD_SINGLE_ARG = 3
+EXT_PYDANTIC_V1 = 4
+EXT_PYDANTIC_V2 = 5
+
+
+def _msgpack_default(obj):
+    if hasattr(obj, "model_dump") and callable(obj.model_dump):  # pydantic v2
+        return msgpack.ExtType(
+            EXT_PYDANTIC_V2,
+            _msgpack_enc(
+                (
+                    obj.__class__.__module__,
+                    obj.__class__.__name__,
+                    obj.model_dump(),
+                    "model_validate_json",
+                ),
+            ),
+        )
+    elif hasattr(obj, "dict") and callable(obj.dict):  # pydantic v1
+        return msgpack.ExtType(
+            EXT_PYDANTIC_V1,
+            _msgpack_enc(
+                (
+                    obj.__class__.__module__,
+                    obj.__class__.__name__,
+                    obj.dict(),
+                ),
+            ),
+        )
+    elif hasattr(obj, "_asdict") and callable(obj._asdict):  # namedtuple
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_KW_ARGS,
+            _msgpack_enc(
+                (
+                    obj.__class__.__module__,
+                    obj.__class__.__name__,
+                    obj._asdict(),
+                ),
+            ),
+        )
+    elif isinstance(obj, pathlib.Path):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_POS_ARGS,
+            _msgpack_enc(
+                (obj.__class__.__module__, obj.__class__.__name__, obj.parts),
+            ),
+        )
+    elif isinstance(obj, re.Pattern):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_POS_ARGS,
+            _msgpack_enc(
+                ("re", "compile", (obj.pattern, obj.flags)),
+            ),
+        )
+    elif isinstance(obj, UUID):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_SINGLE_ARG,
+            _msgpack_enc(
+                (obj.__class__.__module__, obj.__class__.__name__, obj.hex),
+            ),
+        )
+    elif isinstance(obj, decimal.Decimal):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_SINGLE_ARG,
+            _msgpack_enc(
+                (obj.__class__.__module__, obj.__class__.__name__, str(obj)),
+            ),
+        )
+    elif isinstance(obj, (set, frozenset, deque)):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_SINGLE_ARG,
+            _msgpack_enc(
+                (obj.__class__.__module__, obj.__class__.__name__, tuple(obj)),
+            ),
+        )
+    elif isinstance(obj, (IPv4Address, IPv4Interface, IPv4Network)):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_SINGLE_ARG,
+            _msgpack_enc(
+                (obj.__class__.__module__, obj.__class__.__name__, str(obj)),
+            ),
+        )
+    elif isinstance(obj, (IPv6Address, IPv6Interface, IPv6Network)):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_SINGLE_ARG,
+            _msgpack_enc(
+                (obj.__class__.__module__, obj.__class__.__name__, str(obj)),
+            ),
+        )
+    elif isinstance(obj, datetime):
+        return msgpack.ExtType(
+            EXT_METHOD_SINGLE_ARG,
+            _msgpack_enc(
+                (
+                    obj.__class__.__module__,
+                    obj.__class__.__name__,
+                    obj.isoformat(),
+                    "fromisoformat",
+                ),
+            ),
+        )
+    elif isinstance(obj, timedelta):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_POS_ARGS,
+            _msgpack_enc(
+                (
+                    obj.__class__.__module__,
+                    obj.__class__.__name__,
+                    (obj.days, obj.seconds, obj.microseconds),
+                ),
+            ),
+        )
+    elif isinstance(obj, date):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_POS_ARGS,
+            _msgpack_enc(
+                (
+                    obj.__class__.__module__,
+                    obj.__class__.__name__,
+                    (obj.year, obj.month, obj.day),
+                ),
+            ),
+        )
+    elif isinstance(obj, time):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_KW_ARGS,
+            _msgpack_enc(
+                (
+                    obj.__class__.__module__,
+                    obj.__class__.__name__,
+                    {
+                        "hour": obj.hour,
+                        "minute": obj.minute,
+                        "second": obj.second,
+                        "microsecond": obj.microsecond,
+                        "tzinfo": obj.tzinfo,
+                        "fold": obj.fold,
+                    },
+                ),
+            ),
+        )
+    elif isinstance(obj, timezone):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_POS_ARGS,
+            _msgpack_enc(
+                (
+                    obj.__class__.__module__,
+                    obj.__class__.__name__,
+                    obj.__getinitargs__(),
+                ),
+            ),
+        )
+    elif isinstance(obj, ZoneInfo):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_SINGLE_ARG,
+            _msgpack_enc(
+                (obj.__class__.__module__, obj.__class__.__name__, obj.key),
+            ),
+        )
+    elif isinstance(obj, Enum):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_SINGLE_ARG,
+            _msgpack_enc(
+                (obj.__class__.__module__, obj.__class__.__name__, obj.value),
+            ),
+        )
+    elif isinstance(obj, SendProtocol):
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_POS_ARGS,
+            _msgpack_enc(
+                (obj.__class__.__module__, obj.__class__.__name__, (obj.node, obj.arg)),
+            ),
+        )
+    elif dataclasses.is_dataclass(obj):
+        # doesn't use dataclasses.asdict to avoid deepcopy and recursion
+        return msgpack.ExtType(
+            EXT_CONSTRUCTOR_KW_ARGS,
+            _msgpack_enc(
+                (
+                    obj.__class__.__module__,
+                    obj.__class__.__name__,
+                    {
+                        field.name: getattr(obj, field.name)
+                        for field in dataclasses.fields(obj)
+                    },
+                ),
+            ),
+        )
+    elif isinstance(obj, BaseException):
+        return repr(obj)
+    else:
+        raise TypeError(f"Object of type {obj.__class__.__name__} is not serializable")
+
+
+def _msgpack_ext_hook(code: int, data: bytes):
+    if code == EXT_CONSTRUCTOR_SINGLE_ARG:
+        try:
+            tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
+            # module, name, arg
+            return getattr(importlib.import_module(tup[0]), tup[1])(tup[2])
+        except Exception:
+            return
+    elif code == EXT_CONSTRUCTOR_POS_ARGS:
+        try:
+            tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
+            # module, name, args
+            return getattr(importlib.import_module(tup[0]), tup[1])(*tup[2])
+        except Exception:
+            return
+    elif code == EXT_CONSTRUCTOR_KW_ARGS:
+        try:
+            tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
+            # module, name, args
+            return getattr(importlib.import_module(tup[0]), tup[1])(**tup[2])
+        except Exception:
+            return
+    elif code == EXT_METHOD_SINGLE_ARG:
+        try:
+            tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
+            # module, name, arg, method
+            return getattr(getattr(importlib.import_module(tup[0]), tup[1]), tup[3])(
+                tup[2]
+            )
+        except Exception:
+            return
+    elif code == EXT_PYDANTIC_V1:
+        try:
+            tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
+            # module, name, kwargs
+            cls = getattr(importlib.import_module(tup[0]), tup[1])
+            try:
+                return cls(**tup[2])
+            except Exception:
+                return cls.construct(**tup[2])
+        except Exception:
+            return
+    elif code == EXT_PYDANTIC_V2:
+        try:
+            tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
+            # module, name, kwargs, method
+            cls = getattr(importlib.import_module(tup[0]), tup[1])
+            try:
+                return cls(**tup[2])
+            except Exception:
+                return cls.model_construct(**tup[2])
+        except Exception:
+            return
+
+
+ENC_POOL = deque(maxlen=32)
+
+
+def _msgpack_enc(data: Any) -> bytes:
+    try:
+        enc = ENC_POOL.popleft()
+    except IndexError:
+        enc = msgpack.Packer(default=_msgpack_default)
+    try:
+        return enc.pack(data)
+    finally:
+        ENC_POOL.append(enc)
diff --git a/libs/checkpoint/poetry.lock b/libs/checkpoint/poetry.lock
index f8e3cd636..defa5dfb7 100644
--- a/libs/checkpoint/poetry.lock
+++ b/libs/checkpoint/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.2 and should not be changed by hand.
 
 [[package]]
 name = "annotated-types"
@@ -286,6 +286,79 @@ dev = ["marshmallow[tests]", "pre-commit (>=3.5,<4.0)", "tox"]
 docs = ["alabaster (==0.7.16)", "autodocsumm (==0.2.12)", "sphinx (==7.3.7)", "sphinx-issues (==4.1.0)", "sphinx-version-warning (==1.1.2)"]
 tests = ["pytest", "pytz", "simplejson"]
 
+[[package]]
+name = "msgpack"
+version = "1.1.0"
+description = "MessagePack serializer"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "msgpack-1.1.0-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:7ad442d527a7e358a469faf43fda45aaf4ac3249c8310a82f0ccff9164e5dccd"},
+    {file = "msgpack-1.1.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:74bed8f63f8f14d75eec75cf3d04ad581da6b914001b474a5d3cd3372c8cc27d"},
+    {file = "msgpack-1.1.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:914571a2a5b4e7606997e169f64ce53a8b1e06f2cf2c3a7273aa106236d43dd5"},
+    {file = "msgpack-1.1.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:c921af52214dcbb75e6bdf6a661b23c3e6417f00c603dd2070bccb5c3ef499f5"},
+    {file = "msgpack-1.1.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:d8ce0b22b890be5d252de90d0e0d119f363012027cf256185fc3d474c44b1b9e"},
+    {file = "msgpack-1.1.0-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:73322a6cc57fcee3c0c57c4463d828e9428275fb85a27aa2aa1a92fdc42afd7b"},
+    {file = "msgpack-1.1.0-cp310-cp310-musllinux_1_2_aarch64.whl", hash = "sha256:e1f3c3d21f7cf67bcf2da8e494d30a75e4cf60041d98b3f79875afb5b96f3a3f"},
+    {file = "msgpack-1.1.0-cp310-cp310-musllinux_1_2_i686.whl", hash = "sha256:64fc9068d701233effd61b19efb1485587560b66fe57b3e50d29c5d78e7fef68"},
+    {file = "msgpack-1.1.0-cp310-cp310-musllinux_1_2_x86_64.whl", hash = "sha256:42f754515e0f683f9c79210a5d1cad631ec3d06cea5172214d2176a42e67e19b"},
+    {file = "msgpack-1.1.0-cp310-cp310-win32.whl", hash = "sha256:3df7e6b05571b3814361e8464f9304c42d2196808e0119f55d0d3e62cd5ea044"},
+    {file = "msgpack-1.1.0-cp310-cp310-win_amd64.whl", hash = "sha256:685ec345eefc757a7c8af44a3032734a739f8c45d1b0ac45efc5d8977aa4720f"},
+    {file = "msgpack-1.1.0-cp311-cp311-macosx_10_9_universal2.whl", hash = "sha256:3d364a55082fb2a7416f6c63ae383fbd903adb5a6cf78c5b96cc6316dc1cedc7"},
+    {file = "msgpack-1.1.0-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:79ec007767b9b56860e0372085f8504db5d06bd6a327a335449508bbee9648fa"},
+    {file = "msgpack-1.1.0-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:6ad622bf7756d5a497d5b6836e7fc3752e2dd6f4c648e24b1803f6048596f701"},
+    {file = "msgpack-1.1.0-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:8e59bca908d9ca0de3dc8684f21ebf9a690fe47b6be93236eb40b99af28b6ea6"},
+    {file = "msgpack-1.1.0-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:5e1da8f11a3dd397f0a32c76165cf0c4eb95b31013a94f6ecc0b280c05c91b59"},
+    {file = "msgpack-1.1.0-cp311-cp311-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:452aff037287acb1d70a804ffd022b21fa2bb7c46bee884dbc864cc9024128a0"},
+    {file = "msgpack-1.1.0-cp311-cp311-musllinux_1_2_aarch64.whl", hash = "sha256:8da4bf6d54ceed70e8861f833f83ce0814a2b72102e890cbdfe4b34764cdd66e"},
+    {file = "msgpack-1.1.0-cp311-cp311-musllinux_1_2_i686.whl", hash = "sha256:41c991beebf175faf352fb940bf2af9ad1fb77fd25f38d9142053914947cdbf6"},
+    {file = "msgpack-1.1.0-cp311-cp311-musllinux_1_2_x86_64.whl", hash = "sha256:a52a1f3a5af7ba1c9ace055b659189f6c669cf3657095b50f9602af3a3ba0fe5"},
+    {file = "msgpack-1.1.0-cp311-cp311-win32.whl", hash = "sha256:58638690ebd0a06427c5fe1a227bb6b8b9fdc2bd07701bec13c2335c82131a88"},
+    {file = "msgpack-1.1.0-cp311-cp311-win_amd64.whl", hash = "sha256:fd2906780f25c8ed5d7b323379f6138524ba793428db5d0e9d226d3fa6aa1788"},
+    {file = "msgpack-1.1.0-cp312-cp312-macosx_10_9_universal2.whl", hash = "sha256:d46cf9e3705ea9485687aa4001a76e44748b609d260af21c4ceea7f2212a501d"},
+    {file = "msgpack-1.1.0-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:5dbad74103df937e1325cc4bfeaf57713be0b4f15e1c2da43ccdd836393e2ea2"},
+    {file = "msgpack-1.1.0-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:58dfc47f8b102da61e8949708b3eafc3504509a5728f8b4ddef84bd9e16ad420"},
+    {file = "msgpack-1.1.0-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:4676e5be1b472909b2ee6356ff425ebedf5142427842aa06b4dfd5117d1ca8a2"},
+    {file = "msgpack-1.1.0-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:17fb65dd0bec285907f68b15734a993ad3fc94332b5bb21b0435846228de1f39"},
+    {file = "msgpack-1.1.0-cp312-cp312-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:a51abd48c6d8ac89e0cfd4fe177c61481aca2d5e7ba42044fd218cfd8ea9899f"},
+    {file = "msgpack-1.1.0-cp312-cp312-musllinux_1_2_aarch64.whl", hash = "sha256:2137773500afa5494a61b1208619e3871f75f27b03bcfca7b3a7023284140247"},
+    {file = "msgpack-1.1.0-cp312-cp312-musllinux_1_2_i686.whl", hash = "sha256:398b713459fea610861c8a7b62a6fec1882759f308ae0795b5413ff6a160cf3c"},
+    {file = "msgpack-1.1.0-cp312-cp312-musllinux_1_2_x86_64.whl", hash = "sha256:06f5fd2f6bb2a7914922d935d3b8bb4a7fff3a9a91cfce6d06c13bc42bec975b"},
+    {file = "msgpack-1.1.0-cp312-cp312-win32.whl", hash = "sha256:ad33e8400e4ec17ba782f7b9cf868977d867ed784a1f5f2ab46e7ba53b6e1e1b"},
+    {file = "msgpack-1.1.0-cp312-cp312-win_amd64.whl", hash = "sha256:115a7af8ee9e8cddc10f87636767857e7e3717b7a2e97379dc2054712693e90f"},
+    {file = "msgpack-1.1.0-cp313-cp313-macosx_10_13_universal2.whl", hash = "sha256:071603e2f0771c45ad9bc65719291c568d4edf120b44eb36324dcb02a13bfddf"},
+    {file = "msgpack-1.1.0-cp313-cp313-macosx_10_13_x86_64.whl", hash = "sha256:0f92a83b84e7c0749e3f12821949d79485971f087604178026085f60ce109330"},
+    {file = "msgpack-1.1.0-cp313-cp313-macosx_11_0_arm64.whl", hash = "sha256:4a1964df7b81285d00a84da4e70cb1383f2e665e0f1f2a7027e683956d04b734"},
+    {file = "msgpack-1.1.0-cp313-cp313-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:59caf6a4ed0d164055ccff8fe31eddc0ebc07cf7326a2aaa0dbf7a4001cd823e"},
+    {file = "msgpack-1.1.0-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:0907e1a7119b337971a689153665764adc34e89175f9a34793307d9def08e6ca"},
+    {file = "msgpack-1.1.0-cp313-cp313-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:65553c9b6da8166e819a6aa90ad15288599b340f91d18f60b2061f402b9a4915"},
+    {file = "msgpack-1.1.0-cp313-cp313-musllinux_1_2_aarch64.whl", hash = "sha256:7a946a8992941fea80ed4beae6bff74ffd7ee129a90b4dd5cf9c476a30e9708d"},
+    {file = "msgpack-1.1.0-cp313-cp313-musllinux_1_2_i686.whl", hash = "sha256:4b51405e36e075193bc051315dbf29168d6141ae2500ba8cd80a522964e31434"},
+    {file = "msgpack-1.1.0-cp313-cp313-musllinux_1_2_x86_64.whl", hash = "sha256:b4c01941fd2ff87c2a934ee6055bda4ed353a7846b8d4f341c428109e9fcde8c"},
+    {file = "msgpack-1.1.0-cp313-cp313-win32.whl", hash = "sha256:7c9a35ce2c2573bada929e0b7b3576de647b0defbd25f5139dcdaba0ae35a4cc"},
+    {file = "msgpack-1.1.0-cp313-cp313-win_amd64.whl", hash = "sha256:bce7d9e614a04d0883af0b3d4d501171fbfca038f12c77fa838d9f198147a23f"},
+    {file = "msgpack-1.1.0-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:c40ffa9a15d74e05ba1fe2681ea33b9caffd886675412612d93ab17b58ea2fec"},
+    {file = "msgpack-1.1.0-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:f1ba6136e650898082d9d5a5217d5906d1e138024f836ff48691784bbe1adf96"},
+    {file = "msgpack-1.1.0-cp38-cp38-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:e0856a2b7e8dcb874be44fea031d22e5b3a19121be92a1e098f46068a11b0870"},
+    {file = "msgpack-1.1.0-cp38-cp38-musllinux_1_2_aarch64.whl", hash = "sha256:471e27a5787a2e3f974ba023f9e265a8c7cfd373632247deb225617e3100a3c7"},
+    {file = "msgpack-1.1.0-cp38-cp38-musllinux_1_2_i686.whl", hash = "sha256:646afc8102935a388ffc3914b336d22d1c2d6209c773f3eb5dd4d6d3b6f8c1cb"},
+    {file = "msgpack-1.1.0-cp38-cp38-musllinux_1_2_x86_64.whl", hash = "sha256:13599f8829cfbe0158f6456374e9eea9f44eee08076291771d8ae93eda56607f"},
+    {file = "msgpack-1.1.0-cp38-cp38-win32.whl", hash = "sha256:8a84efb768fb968381e525eeeb3d92857e4985aacc39f3c47ffd00eb4509315b"},
+    {file = "msgpack-1.1.0-cp38-cp38-win_amd64.whl", hash = "sha256:879a7b7b0ad82481c52d3c7eb99bf6f0645dbdec5134a4bddbd16f3506947feb"},
+    {file = "msgpack-1.1.0-cp39-cp39-macosx_10_9_universal2.whl", hash = "sha256:53258eeb7a80fc46f62fd59c876957a2d0e15e6449a9e71842b6d24419d88ca1"},
+    {file = "msgpack-1.1.0-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:7e7b853bbc44fb03fbdba34feb4bd414322180135e2cb5164f20ce1c9795ee48"},
+    {file = "msgpack-1.1.0-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:f3e9b4936df53b970513eac1758f3882c88658a220b58dcc1e39606dccaaf01c"},
+    {file = "msgpack-1.1.0-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:46c34e99110762a76e3911fc923222472c9d681f1094096ac4102c18319e6468"},
+    {file = "msgpack-1.1.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:8a706d1e74dd3dea05cb54580d9bd8b2880e9264856ce5068027eed09680aa74"},
+    {file = "msgpack-1.1.0-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:534480ee5690ab3cbed89d4c8971a5c631b69a8c0883ecfea96c19118510c846"},
+    {file = "msgpack-1.1.0-cp39-cp39-musllinux_1_2_aarch64.whl", hash = "sha256:8cf9e8c3a2153934a23ac160cc4cba0ec035f6867c8013cc6077a79823370346"},
+    {file = "msgpack-1.1.0-cp39-cp39-musllinux_1_2_i686.whl", hash = "sha256:3180065ec2abbe13a4ad37688b61b99d7f9e012a535b930e0e683ad6bc30155b"},
+    {file = "msgpack-1.1.0-cp39-cp39-musllinux_1_2_x86_64.whl", hash = "sha256:c5a91481a3cc573ac8c0d9aace09345d989dc4a0202b7fcb312c88c26d4e71a8"},
+    {file = "msgpack-1.1.0-cp39-cp39-win32.whl", hash = "sha256:f80bc7d47f76089633763f952e67f8214cb7b3ee6bfa489b3cb6a84cfac114cd"},
+    {file = "msgpack-1.1.0-cp39-cp39-win_amd64.whl", hash = "sha256:4d1b7ff2d6146e16e8bd665ac726a89c74163ef8cd39fa8c1087d4e52d3a2325"},
+    {file = "msgpack-1.1.0.tar.gz", hash = "sha256:dd432ccc2c72b914e4cb77afce64aab761c1137cc698be3984eee260bcb2896e"},
+]
+
 [[package]]
 name = "mypy"
 version = "1.11.0"
@@ -851,4 +924,4 @@ watchmedo = ["PyYAML (>=3.10)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9.0,<4.0"
-content-hash = "d4c13800471766fa9e2d11d2f1092f02fbf28cc507189aeea8a3d5b297286068"
+content-hash = "8861f12053a7b4594cd8a218f31b78f861d7e5391017bc9209cc5bccbd6f769c"
diff --git a/libs/checkpoint/pyproject.toml b/libs/checkpoint/pyproject.toml
index 00183d2f8..ae773fc3f 100644
--- a/libs/checkpoint/pyproject.toml
+++ b/libs/checkpoint/pyproject.toml
@@ -11,6 +11,7 @@ packages = [{ include = "langgraph" }]
 [tool.poetry.dependencies]
 python = "^3.9.0,<4.0"
 langchain-core = ">=0.2.38,<0.4"
+msgpack = "^1.1.0"
 
 [tool.poetry.group.dev.dependencies]
 ruff = "^0.6.2"
diff --git a/libs/checkpoint/tests/test_jsonplus.py b/libs/checkpoint/tests/test_jsonplus.py
index a9f5d71e6..e52531414 100644
--- a/libs/checkpoint/tests/test_jsonplus.py
+++ b/libs/checkpoint/tests/test_jsonplus.py
@@ -10,7 +10,6 @@
 from ipaddress import IPv4Address
 
 import dataclasses_json
-from langchain_core.runnables import RunnableMap
 from pydantic import BaseModel
 from pydantic.v1 import BaseModel as BaseModelV1
 from zoneinfo import ZoneInfo
@@ -18,20 +17,36 @@
 from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer
 
 
+class InnerPydantic(BaseModel):
+    hello: str
+
+
 class MyPydantic(BaseModel):
     foo: str
     bar: int
+    inner: InnerPydantic
+
 
+class InnerPydanticV1(BaseModelV1):
+    hello: str
 
-class MyFunnyPydantic(BaseModelV1):
+
+class MyPydanticV1(BaseModelV1):
     foo: str
     bar: int
+    inner: InnerPydanticV1
+
+
+@dataclasses.dataclass
+class InnerDataclass:
+    hello: str
 
 
 @dataclasses.dataclass
 class MyDataclass:
     foo: str
     bar: int
+    inner: InnerDataclass
 
     def something(self) -> None:
         pass
@@ -48,6 +63,7 @@ class MyDataclassWSlots(MyDataclass):
     class MyDataclassWSlots:
         foo: str
         bar: int
+        inner: InnerDataclass
 
         def something(self) -> None:
             pass
@@ -77,6 +93,8 @@ def test_serde_jsonplus() -> None:
         "path": pathlib.Path("foo", "bar"),
         "re": re.compile(r"foo", re.DOTALL),
         "decimal": Decimal("1.10101"),
+        "set": {1, 2, frozenset({1, 2})},
+        "frozen_set": frozenset({1, 2, 3}),
         "ip4": ip4,
         "deque": deque_instance,
         "tzn": tzn,
@@ -84,11 +102,13 @@ def test_serde_jsonplus() -> None:
         "time": current_time,
         "uid": uid,
         "timestamp": current_timestamp,
-        "my_slotted_class": MyDataclassWSlots("bar", 2),
-        "my_dataclass": MyDataclass("foo", 1),
+        "my_slotted_class": MyDataclassWSlots("bar", 2, InnerDataclass("hello")),
+        "my_dataclass": MyDataclass("foo", 1, InnerDataclass("hello")),
         "my_enum": MyEnum.FOO,
-        "my_pydantic": MyPydantic(foo="foo", bar=1),
-        "my_funny_pydantic": MyFunnyPydantic(foo="foo", bar=1),
+        "my_pydantic": MyPydantic(foo="foo", bar=1, inner=InnerPydantic(hello="hello")),
+        "my_pydantic_v1": MyPydanticV1(
+            foo="foo", bar=1, inner=InnerPydanticV1(hello="hello")
+        ),
         "person": Person(name="foo"),
         "a_bool": True,
         "a_none": None,
@@ -97,23 +117,8 @@ def test_serde_jsonplus() -> None:
         "a_str_uc": "foo ⛰️",
         "a_str_ucuc": "foo \u26f0\ufe0f\u0000",
         "a_str_ucucuc": "foo \\u26f0\\ufe0f",
-        "text": [
-            "Hello\ud83d\ude00",
-            "Python\ud83d\udc0d",
-            "Surrogate\ud834\udd1e",
-            "Example\ud83c\udf89",
-            "String\ud83c\udfa7",
-            "With\ud83c\udf08",
-            "Surrogates\ud83d\ude0e",
-            "Embedded\ud83d\udcbb",
-            "In\ud83c\udf0e",
-            "The\ud83d\udcd6",
-            "Text\ud83d\udcac",
-            "收花🙄·到",
-        ],
         "an_int": 1,
         "a_float": 1.1,
-        "runnable_map": RunnableMap({}),
         "a_bytes": b"my bytes",
         "a_bytearray": bytearray([42]),
     }
@@ -122,23 +127,30 @@ def test_serde_jsonplus() -> None:
 
     dumped = serde.dumps_typed(to_serialize)
 
-    assert dumped == (
-        "json",
-        b"""{"path": {"lc": 2, "type": "constructor", "id": ["pathlib", "Path"], "args": ["foo", "bar"]}, "re": {"lc": 2, "type": "constructor", "id": ["re", "compile"], "args": ["foo", 48]}, "decimal": {"lc": 2, "type": "constructor", "id": ["decimal", "Decimal"], "args": ["1.10101"]}, "ip4": {"lc": 2, "type": "constructor", "id": ["ipaddress", "IPv4Address"], "args": ["192.168.0.1"]}, "deque": {"lc": 2, "type": "constructor", "id": ["collections", "deque"], "args": [[1, 2, 3]]}, "tzn": {"lc": 2, "type": "constructor", "id": ["zoneinfo", "ZoneInfo"], "args": ["America/New_York"]}, "date": {"lc": 2, "type": "constructor", "id": ["datetime", "date"], "args": [2024, 4, 19]}, "time": {"lc": 2, "type": "constructor", "id": ["datetime", "time"], "args": [23, 4, 57, 51022, {"lc": 2, "type": "constructor", "id": ["datetime", "timezone"], "args": [{"lc": 2, "type": "constructor", "id": ["datetime", "timedelta"], "args": [0, 86340, 0]}]}], "kwargs": {"fold": 0}}, "uid": {"lc": 2, "type": "constructor", "id": ["uuid", "UUID"], "args": ["00000000000000000000000000000001"]}, "timestamp": {"lc": 2, "type": "constructor", "id": ["datetime", "datetime"], "method": "fromisoformat", "args": ["2024-04-19T23:04:57.051022+23:59"]}, "my_slotted_class": {"lc": 2, "type": "constructor", "id": ["tests", "test_jsonplus", "MyDataclassWSlots"], "kwargs": {"foo": "bar", "bar": 2}}, "my_dataclass": {"lc": 2, "type": "constructor", "id": ["tests", "test_jsonplus", "MyDataclass"], "kwargs": {"foo": "foo", "bar": 1}}, "my_enum": {"lc": 2, "type": "constructor", "id": ["tests", "test_jsonplus", "MyEnum"], "args": ["foo"]}, "my_pydantic": {"lc": 2, "type": "constructor", "id": ["tests", "test_jsonplus", "MyPydantic"], "method": [null, "model_construct"], "kwargs": {"foo": "foo", "bar": 1}}, "my_funny_pydantic": {"lc": 2, "type": "constructor", "id": ["tests", "test_jsonplus", "MyFunnyPydantic"], "method": [null, "construct"], "kwargs": {"foo": "foo", "bar": 1}}, "person": {"lc": 2, "type": "constructor", "id": ["tests", "test_jsonplus", "Person"], "kwargs": {"name": "foo"}}, "a_bool": true, "a_none": null, "a_str": "foo", "a_str_nuc": "foo\\u0000", "a_str_uc": "foo \xe2\x9b\xb0\xef\xb8\x8f", "a_str_ucuc": "foo \xe2\x9b\xb0\xef\xb8\x8f\\u0000", "a_str_ucucuc": "foo \\\\u26f0\\\\ufe0f", "text": ["Hello", "Python", "Surrogate", "Example", "String", "With", "Surrogates", "Embedded", "In", "The", "Text", "\xe6\x94\xb6\xe8\x8a\xb1\xf0\x9f\x99\x84\xc2\xb7\xe5\x88\xb0"], "an_int": 1, "a_float": 1.1, "runnable_map": {"lc": 1, "type": "constructor", "id": ["langchain", "schema", "runnable", "RunnableParallel"], "kwargs": {"steps__": {}}, "name": "RunnableParallel<>", "graph": {"nodes": [{"id": 0, "type": "schema", "data": "Parallel<>Input"}, {"id": 1, "type": "schema", "data": "Parallel<>Output"}], "edges": []}}, "a_bytes": {"lc": 2, "type": "constructor", "id": ["builtins", "bytes"], "method": "fromhex", "args": ["6d79206279746573"]}, "a_bytearray": {"lc": 2, "type": "constructor", "id": ["builtins", "bytearray"], "method": "fromhex", "args": ["2a"]}}""",
-    )
-
-    assert serde.loads_typed(dumped) == {
-        **to_serialize,
-        "text": [v.encode("utf-8", "ignore").decode() for v in to_serialize["text"]],
-    }
-
-    for key, value in to_serialize.items():
-        if key == "text":
-            assert serde.loads_typed(serde.dumps_typed(value)) == [
-                v.encode("utf-8", "ignore").decode() for v in value
-            ]
-        else:
-            assert serde.loads_typed(serde.dumps_typed(value)) == value
+    assert dumped[0] == "msgpack"
+    assert serde.loads_typed(dumped) == to_serialize
+
+    for value in to_serialize.values():
+        assert serde.loads_typed(serde.dumps_typed(value)) == value
+
+    surrogates = [
+        "Hello\ud83d\ude00",
+        "Python\ud83d\udc0d",
+        "Surrogate\ud834\udd1e",
+        "Example\ud83c\udf89",
+        "String\ud83c\udfa7",
+        "With\ud83c\udf08",
+        "Surrogates\ud83d\ude0e",
+        "Embedded\ud83d\udcbb",
+        "In\ud83c\udf0e",
+        "The\ud83d\udcd6",
+        "Text\ud83d\udcac",
+        "收花🙄·到",
+    ]
+
+    assert serde.loads_typed(serde.dumps_typed(surrogates)) == [
+        v.encode("utf-8", "ignore").decode() for v in surrogates
+    ]
 
 
 def test_serde_jsonplus_bytes() -> None:
diff --git a/libs/langgraph/poetry.lock b/libs/langgraph/poetry.lock
index 375c77897..b6f161afa 100644
--- a/libs/langgraph/poetry.lock
+++ b/libs/langgraph/poetry.lock
@@ -1247,6 +1247,7 @@ develop = true
 
 [package.dependencies]
 langchain-core = ">=0.2.38,<0.4"
+msgpack = "^1.1.0"
 
 [package.source]
 type = "directory"
@@ -1402,6 +1403,79 @@ files = [
     {file = "mistune-3.0.2.tar.gz", hash = "sha256:fc7f93ded930c92394ef2cb6f04a8aabab4117a91449e72dcc8dfa646a508be8"},
 ]
 
+[[package]]
+name = "msgpack"
+version = "1.1.0"
+description = "MessagePack serializer"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "msgpack-1.1.0-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:7ad442d527a7e358a469faf43fda45aaf4ac3249c8310a82f0ccff9164e5dccd"},
+    {file = "msgpack-1.1.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:74bed8f63f8f14d75eec75cf3d04ad581da6b914001b474a5d3cd3372c8cc27d"},
+    {file = "msgpack-1.1.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:914571a2a5b4e7606997e169f64ce53a8b1e06f2cf2c3a7273aa106236d43dd5"},
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+    {file = "msgpack-1.1.0.tar.gz", hash = "sha256:dd432ccc2c72b914e4cb77afce64aab761c1137cc698be3984eee260bcb2896e"},
+]
+
 [[package]]
 name = "mypy"
 version = "1.10.0"
diff --git a/libs/scheduler-kafka/langgraph/scheduler/kafka/serde.py b/libs/scheduler-kafka/langgraph/scheduler/kafka/serde.py
index 952de1721..9868f5ae8 100644
--- a/libs/scheduler-kafka/langgraph/scheduler/kafka/serde.py
+++ b/libs/scheduler-kafka/langgraph/scheduler/kafka/serde.py
@@ -2,9 +2,13 @@
 
 import orjson
 
+from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer
+
+SERIALIZER = JsonPlusSerializer()
+
 
 def loads(v: bytes) -> Any:
-    return orjson.loads(v)
+    return SERIALIZER.loads(v)
 
 
 def dumps(v: Any) -> bytes:
diff --git a/libs/scheduler-kafka/poetry.lock b/libs/scheduler-kafka/poetry.lock
index 0d1a89d12..bd2ddfbfd 100644
--- a/libs/scheduler-kafka/poetry.lock
+++ b/libs/scheduler-kafka/poetry.lock
@@ -488,21 +488,21 @@ zstd = ["zstandard"]
 
 [[package]]
 name = "langchain-core"
-version = "0.2.38"
+version = "0.3.0"
 description = "Building applications with LLMs through composability"
 optional = false
-python-versions = "<4.0,>=3.8.1"
+python-versions = "<4.0,>=3.9"
 files = [
-    {file = "langchain_core-0.2.38-py3-none-any.whl", hash = "sha256:8a5729bc7e68b4af089af20eff44fe4e7ca21d0e0c87ec21cef7621981fd1a4a"},
-    {file = "langchain_core-0.2.38.tar.gz", hash = "sha256:eb69dbedd344f2ee1f15bcea6c71a05884b867588fadc42d04632e727c1238f3"},
+    {file = "langchain_core-0.3.0-py3-none-any.whl", hash = "sha256:bee6dae2366d037ef0c5b87401fed14b5497cad26f97724e8c9ca7bc9239e847"},
+    {file = "langchain_core-0.3.0.tar.gz", hash = "sha256:1249149ea3ba24c9c761011483c14091573a5eb1a773aa0db9c8ad155dd4a69d"},
 ]
 
 [package.dependencies]
 jsonpatch = ">=1.33,<2.0"
-langsmith = ">=0.1.75,<0.2.0"
+langsmith = ">=0.1.117,<0.2.0"
 packaging = ">=23.2,<25"
 pydantic = [
-    {version = ">=1,<3", markers = "python_full_version < \"3.12.4\""},
+    {version = ">=2.5.2,<3.0.0", markers = "python_full_version < \"3.12.4\""},
     {version = ">=2.7.4,<3.0.0", markers = "python_full_version >= \"3.12.4\""},
 ]
 PyYAML = ">=5.3"
@@ -511,7 +511,7 @@ typing-extensions = ">=4.7"
 
 [[package]]
 name = "langgraph"
-version = "0.2.19"
+version = "0.2.20"
 description = "Building stateful, multi-actor applications with LLMs"
 optional = false
 python-versions = ">=3.9.0,<4.0"
@@ -519,7 +519,7 @@ files = []
 develop = true
 
 [package.dependencies]
-langchain-core = ">=0.2.38,<0.4"
+langchain-core = ">=0.2.39,<0.4"
 langgraph-checkpoint = "^1.0.2"
 
 [package.source]
@@ -537,6 +537,7 @@ develop = true
 
 [package.dependencies]
 langchain-core = ">=0.2.38,<0.4"
+msgpack = "^1.1.0"
 
 [package.source]
 type = "directory"
@@ -563,13 +564,13 @@ url = "../checkpoint-postgres"
 
 [[package]]
 name = "langsmith"
-version = "0.1.115"
+version = "0.1.120"
 description = "Client library to connect to the LangSmith LLM Tracing and Evaluation Platform."
 optional = false
 python-versions = "<4.0,>=3.8.1"
 files = [
-    {file = "langsmith-0.1.115-py3-none-any.whl", hash = "sha256:04e35cfd4c2d4ff1ea10bb577ff43957b05ebb3d9eb4e06e200701f4a2b4ac9f"},
-    {file = "langsmith-0.1.115.tar.gz", hash = "sha256:3b775377d858d32354f3ee0dd1ed637068cfe9a1f13e7b3bfa82db1615cdffc9"},
+    {file = "langsmith-0.1.120-py3-none-any.whl", hash = "sha256:54d2785e301646c0988e0a69ebe4d976488c87b41928b358cb153b6ddd8db62b"},
+    {file = "langsmith-0.1.120.tar.gz", hash = "sha256:25499ca187b41bd89d784b272b97a8d76f60e0e21bdf20336e8a2aa6a9b23ac9"},
 ]
 
 [package.dependencies]
@@ -581,6 +582,79 @@ pydantic = [
 ]
 requests = ">=2,<3"
 
+[[package]]
+name = "msgpack"
+version = "1.1.0"
+description = "MessagePack serializer"
+optional = false
+python-versions = ">=3.8"
+files = [
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+
 [[package]]
 name = "mypy"
 version = "1.11.0"
diff --git a/libs/scheduler-kafka/tests/test_subgraph.py b/libs/scheduler-kafka/tests/test_subgraph.py
index ad6d7553c..54172ef9b 100644
--- a/libs/scheduler-kafka/tests/test_subgraph.py
+++ b/libs/scheduler-kafka/tests/test_subgraph.py
@@ -15,7 +15,7 @@
 from langgraph.pregel import Pregel
 from langgraph.scheduler.kafka import serde
 from langgraph.scheduler.kafka.types import MessageToOrchestrator, Topics
-from tests.any import AnyDict, AnyStr
+from tests.any import AnyDict
 from tests.drain import drain_topics_async
 from tests.messages import _AnyIdAIMessage, _AnyIdHumanMessage
 
@@ -210,21 +210,7 @@ async def test_subgraph_w_interrupt(
                     },
                     "input": {
                         "messages": [
-                            {
-                                "id": [
-                                    "langchain",
-                                    "schema",
-                                    "messages",
-                                    "HumanMessage",
-                                ],
-                                "kwargs": {
-                                    "content": "what's the weather in sf",
-                                    "id": AnyStr(),
-                                    "type": "human",
-                                },
-                                "lc": 1,
-                                "type": "constructor",
-                            }
+                            _AnyIdHumanMessage(content="what's the weather in sf")
                         ],
                         "route": "weather",
                     },
diff --git a/libs/scheduler-kafka/tests/test_subgraph_sync.py b/libs/scheduler-kafka/tests/test_subgraph_sync.py
index 53f651050..16576b343 100644
--- a/libs/scheduler-kafka/tests/test_subgraph_sync.py
+++ b/libs/scheduler-kafka/tests/test_subgraph_sync.py
@@ -15,7 +15,7 @@
 from langgraph.scheduler.kafka import serde
 from langgraph.scheduler.kafka.default_sync import DefaultProducer
 from langgraph.scheduler.kafka.types import MessageToOrchestrator, Topics
-from tests.any import AnyDict, AnyStr
+from tests.any import AnyDict
 from tests.drain import drain_topics
 from tests.messages import _AnyIdAIMessage, _AnyIdHumanMessage
 
@@ -209,21 +209,7 @@ def test_subgraph_w_interrupt(
                     },
                     "input": {
                         "messages": [
-                            {
-                                "id": [
-                                    "langchain",
-                                    "schema",
-                                    "messages",
-                                    "HumanMessage",
-                                ],
-                                "kwargs": {
-                                    "content": "what's the weather in sf",
-                                    "id": AnyStr(),
-                                    "type": "human",
-                                },
-                                "lc": 1,
-                                "type": "constructor",
-                            }
+                            _AnyIdHumanMessage(content="what's the weather in sf")
                         ],
                         "route": "weather",
                     },