diff --git a/CHANGELOG.md b/CHANGELOG.md
index e31982a8..f179b073 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 4.5.5
+* iOS 最小版本支持为12.0
+
 # 4.5.4
 * Merge #606
 
diff --git a/pubspec.yaml b/pubspec.yaml
index ba52d0bf..77724fd5 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: fluwx
 description: The capability of implementing WeChat SDKs in Flutter. With Fluwx, developers can use WeChatSDK easily, such as sharing, payment, lanuch mini program and etc.
-version: 4.5.4
+version: 4.5.5
 homepage: https://github.com/OpenFlutter/fluwx
 
 environment: