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 d8e2ecf..a3165c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,20 @@
 # Changelog
 
+## 0.4.0 (2024-07-12)
+
+Full Changelog: [v0.3.0...v0.4.0](https://github.com/writer/writer-python/compare/v0.3.0...v0.4.0)
+
+### Features
+
+* **api:** OpenAPI spec update via Stainless API ([#25](https://github.com/writer/writer-python/issues/25)) ([14d73d7](https://github.com/writer/writer-python/commit/14d73d7d933e8a8ed737e0deb94e163060e99e00))
+
+
+### Bug Fixes
+
+* **client:** correct file uploads setup ([269d7e5](https://github.com/writer/writer-python/commit/269d7e503d176832bb61eca6830d159d4b5154c4))
+* **files:** remove content_length argument ([9a57374](https://github.com/writer/writer-python/commit/9a57374ed7bd8735ae11b97339ac19d5564e4038))
+* **pkg:** remove unwanted files ([270fe31](https://github.com/writer/writer-python/commit/270fe3188a9dd0bba89fe3f0e69d32cc4ce77c3b))
+
 ## 0.3.0 (2024-07-12)
 
 Full Changelog: [v0.2.0...v0.3.0](https://github.com/writer/writer-python/compare/v0.2.0...v0.3.0)
diff --git a/pyproject.toml b/pyproject.toml
index e575965..54b0712 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "writer-sdk"
-version = "0.3.0"
+version = "0.4.0"
 description = "The official Python library for the writer API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/writerai/_version.py b/src/writerai/_version.py
index 0ecdd28..6af8a6b 100644
--- a/src/writerai/_version.py
+++ b/src/writerai/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "writerai"
-__version__ = "0.3.0"  # x-release-please-version
+__version__ = "0.4.0"  # x-release-please-version