diff --git a/CHANGELOG.md b/CHANGELOG.md
index a471182..1761a75 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.4.0](https://github.com/chanzuckerberg/platformics/compare/v0.3.0...v0.4.0) (2024-10-18)
+
+
+### Features
+
+* add default none to pydantic validators ([#116](https://github.com/chanzuckerberg/platformics/issues/116)) ([1af830c](https://github.com/chanzuckerberg/platformics/commit/1af830ce8d760b33cce270b6b7349536e9707670))
+
 ## [0.3.0](https://github.com/chanzuckerberg/platformics/compare/v0.2.0...v0.3.0) (2024-10-10)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index ae09601..f442ec8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [tool.poetry]
 name = "platformics"
 # placeholder version that will be replace by poetry-dynamic-versioning
-version = "0.3.0" 
+version = "0.4.0" 
 description = "Codegen Python GraphQL Entity Framework"
 authors = ["CZI Team <opensource@chanzuckerberg.com>"]
 license = "MIT License"