diff --git a/poetry.lock b/poetry.lock
index b2f6046..fa81ed2 100644
--- a/poetry.lock
+++ b/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 = "asn1crypto"
@@ -95,60 +95,70 @@ pycparser = "*"
 
 [[package]]
 name = "coincurve"
-version = "19.0.1"
+version = "20.0.0"
 description = "Cross-platform Python CFFI bindings for libsecp256k1"
 optional = false
 python-versions = ">=3.8"
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+    {file = "coincurve-20.0.0-cp39-cp39-musllinux_1_1_i686.whl", hash = "sha256:c2baa26b1aad1947ca07b3aa9e6a98940c5141c6bdd0f9b44d89e36da7282ffa"},
+    {file = "coincurve-20.0.0-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:7eacc7944ddf9e2b7448ecbe84753841ab9874b8c332a4f5cc3b2f184db9f4a2"},
+    {file = "coincurve-20.0.0-cp39-cp39-win_amd64.whl", hash = "sha256:c293c095dc690178b822cadaaeb81de3cc0d28f8bdf8216ed23551dcce153a26"},
+    {file = "coincurve-20.0.0-cp39-cp39-win_arm64.whl", hash = "sha256:11a47083a0b7092d3eb50929f74ffd947c4a5e7035796b81310ea85289088c7a"},
+    {file = "coincurve-20.0.0.tar.gz", hash = "sha256:872419e404300302e938849b6b92a196fabdad651060b559dc310e52f8392829"},
 ]
 
 [package.dependencies]
 asn1crypto = "*"
 cffi = ">=1.3.0"
 
+[package.extras]
+dev = ["coverage", "pytest", "pytest-benchmark"]
+
 [[package]]
 name = "colorama"
 version = "0.4.6"
@@ -923,4 +933,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "70aa2ec7801797662825d6c0c758f9b4c88e647922b21a096045e46f8b4f5feb"
+content-hash = "940cdbce542c9167b428bc5107cd70fd97d6e1d9bd5f20e9f56fbd606e5c6492"
diff --git a/pyproject.toml b/pyproject.toml
index 8607999..9d8cbfd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ include = ["ecies/py.typed"]
 python = "^3.8"
 
 # 3rd party
-coincurve = ">=13,<20"
+coincurve = ">=20.0.0,<21"
 eth-keys = ">=0.4,<0.6"
 pycryptodome = "^3.19.1"