diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 6b7b74c..da59f99 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.3.0"
+  ".": "0.4.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8169878..a6c6e3e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.4.0 (2024-01-04)
+
+Full Changelog: [v0.3.0...v0.4.0](https://github.com/Dataherald/dataherald-python/compare/v0.3.0...v0.4.0)
+
+### Features
+
+* **api:** OpenAPI spec update ([#8](https://github.com/Dataherald/dataherald-python/issues/8)) ([13b27e5](https://github.com/Dataherald/dataherald-python/commit/13b27e549bf00c28e1bae3204466ddf75a9a8de5))
+
 ## 0.3.0 (2024-01-04)
 
 Full Changelog: [v0.2.0...v0.3.0](https://github.com/Dataherald/dataherald-python/compare/v0.2.0...v0.3.0)
diff --git a/pyproject.toml b/pyproject.toml
index f556703..3a8adf4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "dataherald"
-version = "0.3.0"
+version = "0.4.0"
 description = "The official Python library for the Dataherald API"
 readme = "README.md"
 license = "Apache-2.0"
diff --git a/src/dataherald/_version.py b/src/dataherald/_version.py
index b72ff47..9a8cc87 100644
--- a/src/dataherald/_version.py
+++ b/src/dataherald/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless.
 
 __title__ = "dataherald"
-__version__ = "0.3.0"  # x-release-please-version
+__version__ = "0.4.0"  # x-release-please-version