diff --git a/packages/dart_mappable/CHANGELOG.md b/packages/dart_mappable/CHANGELOG.md
index c806a74..759d45a 100644
--- a/packages/dart_mappable/CHANGELOG.md
+++ b/packages/dart_mappable/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 4.2.1
+
+- Performance improvements.
+- Updated docs.
+
 # 4.2.0
 
 - Added custom typedef for mapping fields to resolve naming conflict.
diff --git a/packages/dart_mappable/pubspec.yaml b/packages/dart_mappable/pubspec.yaml
index 17de0cb..ef5678d 100644
--- a/packages/dart_mappable/pubspec.yaml
+++ b/packages/dart_mappable/pubspec.yaml
@@ -1,6 +1,6 @@
 name: dart_mappable
 description: Improved json serialization and data classes with full support for generics, inheritance, customization and more.
-version: 4.2.0
+version: 4.2.1
 repository: https://github.com/schultek/dart_mappable
 issue_tracker: https://github.com/schultek/dart_mappable/issues
 documentation: https://pub.dev/documentation/dart_mappable/latest/topics/Introduction-topic.html
@@ -23,6 +23,6 @@ dependencies:
 
 dev_dependencies:
   build_runner: ^2.2.0
-  dart_mappable_builder: ^4.2.0
+  dart_mappable_builder: ^4.2.1
   lints: '>=1.0.0 <3.0.0'
   test: ^1.20.1
diff --git a/packages/dart_mappable_builder/CHANGELOG.md b/packages/dart_mappable_builder/CHANGELOG.md
index f7193e5..9aa6408 100644
--- a/packages/dart_mappable_builder/CHANGELOG.md
+++ b/packages/dart_mappable_builder/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 4.2.1
+
+- Performance improvements.
+
 # 4.2.0
 
 - Added custom typedef for mapping fields to resolve naming conflict.
diff --git a/packages/dart_mappable_builder/pubspec.yaml b/packages/dart_mappable_builder/pubspec.yaml
index e9060e8..7bc2de1 100644
--- a/packages/dart_mappable_builder/pubspec.yaml
+++ b/packages/dart_mappable_builder/pubspec.yaml
@@ -1,6 +1,6 @@
 name: dart_mappable_builder
 description: Improved json serialization and data classes with full support for generics, inheritance, customization and more.
-version: 4.2.0
+version: 4.2.1
 repository: https://github.com/schultek/dart_mappable
 issue_tracker: https://github.com/schultek/dart_mappable/issues
 funding:
@@ -14,7 +14,7 @@ dependencies:
   ansicolor: ^2.0.1
   build: ^2.0.0
   collection: ^1.15.0
-  dart_mappable: ^4.2.0
+  dart_mappable: ^4.2.1
   dart_style: ^2.2.4
   glob: ^2.1.0
   path: ^1.8.0