diff --git a/CHANGELOG.md b/CHANGELOG.md
index a11c950..2552dca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# v0.9.30-stable
+
+1. enhance margin and goneMargin.
+2. enhance size set.
+
 # v0.9.29-stable
 
 enhance grid again.
diff --git a/README.md b/README.md
index b8775c5..cd80a37 100644
--- a/README.md
+++ b/README.md
@@ -168,12 +168,12 @@ dependencies:
   flutter_constraintlayout:
     git:
       url: 'https://github.com/hackware1993/Flutter-ConstraintLayout.git'
-      ref: 'v0.9.29-stable'
+      ref: 'v0.9.30-stable'
 ```
 
 ```yaml
 dependencies:
-  flutter_constraintlayout: ^0.9.29-stable
+  flutter_constraintlayout: ^0.9.30-stable
 ```
 
 ```dart
diff --git a/pubspec.yaml b/pubspec.yaml
index 1be15e2..856f55b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_constraintlayout
 description: A super powerful Stack, build flexible layouts with constraints. Similar to ConstraintLayout for Android and AutoLayout for iOS.
-version: 0.9.29-stable
+version: 0.9.30-stable
 anthor: hackware
 homepage: https://github.com/hackware1993/Flutter-ConstraintLayout