diff --git a/CHANGELOG.md b/CHANGELOG.md
index cc1f5da..f72174a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,9 @@
 # Yii Definitions Change Log
 
-## 3.3.1 under development
+## 3.3.1 December 16, 2024
 
-- Bug #100: Fix resolving `ParameterDefinition` for optional parameters with union types (@vjik)
 - Enh #101: Minor performance improvement by removing unnecessary code in `DefinitionStorage` (@vjik)
+- Bug #100: Fix resolving `ParameterDefinition` for optional parameters with union types (@vjik)
 
 ## 3.3.0 March 16, 2024