diff --git a/CHANGELOG.md b/CHANGELOG.md
index 331176f..c6da738 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## Unreleased
 
+## 2.2.3 (2024-12-12)
+* fix parent_discriminator_schema nil from all_of_validator #179
+
 ## 2.2.2 (2024-11-21)
 * make content-type lookup case-insensitive #178
 
diff --git a/lib/openapi_parser/version.rb b/lib/openapi_parser/version.rb
index 5bd5cdb..7bd5920 100644
--- a/lib/openapi_parser/version.rb
+++ b/lib/openapi_parser/version.rb
@@ -1,3 +1,3 @@
 module OpenAPIParser
-  VERSION = '2.2.2'.freeze
+  VERSION = '2.2.3'.freeze
 end