diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index cce9240..da59f99 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.3.1"
+  ".": "0.4.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba35114..59d324d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## [0.4.0](https://github.com/open-feature/ruby-sdk/compare/v0.3.1...v0.4.0) (2024-06-13)
+
+
+### ⚠ BREAKING CHANGES
+
+* Use strings from spec for error and reason enums ([#131](https://github.com/open-feature/ruby-sdk/issues/131))
+
+### Features
+
+* add hook hints ([#135](https://github.com/open-feature/ruby-sdk/issues/135)) ([51155a7](https://github.com/open-feature/ruby-sdk/commit/51155a7d9cd2c28b38accb9d9b49018bd4868040))
+* Use strings from spec for error and reason enums ([#131](https://github.com/open-feature/ruby-sdk/issues/131)) ([cb2a4cd](https://github.com/open-feature/ruby-sdk/commit/cb2a4cd54059ffe7ed3484be6705ca2a9d590c1a))
+
+
+### Bug Fixes
+
+* synchronize provider registration ([#136](https://github.com/open-feature/ruby-sdk/issues/136)) ([1ff6fd0](https://github.com/open-feature/ruby-sdk/commit/1ff6fd0c3732e9e074c8b30cbe4164a67286b0a4))
+
 ## [0.3.1](https://github.com/open-feature/ruby-sdk/compare/v0.3.0...v0.3.1) (2024-04-22)
 
 
diff --git a/Gemfile.lock b/Gemfile.lock
index bfd2372..899cfe6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    openfeature-sdk (0.3.1)
+    openfeature-sdk (0.4.0)
 
 GEM
   remote: https://rubygems.org/
diff --git a/lib/open_feature/sdk/version.rb b/lib/open_feature/sdk/version.rb
index 5e0d0cb..dd46f23 100644
--- a/lib/open_feature/sdk/version.rb
+++ b/lib/open_feature/sdk/version.rb
@@ -2,6 +2,6 @@
 
 module OpenFeature
   module SDK
-    VERSION = "0.3.1"
+    VERSION = "0.4.0"
   end
 end