diff --git a/CHANGELOG.md b/CHANGELOG.md
index 625ccf01..1701b405 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,7 +14,6 @@
 
 ### Flutter (v1.2.12)
 * Add backup & restore ability.
-* Add a fullset of unit testcase.
 
 ### POSIX / golang / Python
 * Add backup & restore ability.
diff --git a/flutter/CHANGELOG.md b/flutter/CHANGELOG.md
index 6986fa51..1e0cbf8d 100644
--- a/flutter/CHANGELOG.md
+++ b/flutter/CHANGELOG.md
@@ -2,7 +2,6 @@
 
 ## v1.2.12 / 2021-10-26
 * Add backup & restore ability.
-* Add unit test case.
 * Keep up with MMKV native lib v1.2.11.
 
 ## v1.2.11 / 2021-06-25
diff --git a/flutter/README.md b/flutter/README.md
index b5793846..b052066a 100644
--- a/flutter/README.md
+++ b/flutter/README.md
@@ -1,6 +1,6 @@
 [![license](https://img.shields.io/badge/license-BSD_3-brightgreen.svg?style=flat)](https://github.com/Tencent/MMKV/blob/master/LICENSE.TXT)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/Tencent/MMKV/pulls)
-[![Release Version](https://img.shields.io/badge/release-1.2.10-brightgreen.svg)](https://github.com/Tencent/MMKV/releases)
+[![Release Version](https://img.shields.io/badge/release-1.2.12-brightgreen.svg)](https://github.com/Tencent/MMKV/releases)
 [![Platform](https://img.shields.io/badge/Platform-%20Android%20%7C%20iOS-brightgreen.svg)](https://github.com/Tencent/MMKV/wiki/home)
 
 MMKV is an **efficient**, **small**, **easy-to-use** mobile key-value storage framework used in the WeChat application. It's currently available on **Android** and **iOS**.
@@ -26,11 +26,11 @@ Add the following lines to `pubspec.yaml` on your app module. Then run `flutter
 
 ```yaml
 dependencies:
-  mmkv: ">=1.2.10"
+  mmkv: ">=1.2.12"
   ...
 ```
 
-If you already include MMKV native lib in your App, you need to upgrade to version newer than v1.2.9.  
+If you already include MMKV native lib in your App, you need to upgrade to version newer than v1.2.11.  
 
 #### iOS  
 To avoid conflict of the native lib name 'libMMKV.so' on iOS, we need to **change the plugin name 'mmkv' to 'mmkvflutter'**.  
diff --git a/flutter/ios/mmkvflutter.podspec b/flutter/ios/mmkvflutter.podspec
index f73fd07a..784ed373 100644
--- a/flutter/ios/mmkvflutter.podspec
+++ b/flutter/ios/mmkvflutter.podspec
@@ -5,7 +5,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'mmkvflutter'
-  s.version          = '1.2.11'
+  s.version          = '1.2.12'
   s.summary          = 'MMKV is a cross-platform key-value storage framework developed by WeChat.'
   s.description      = <<-DESC
   The MMKV, for Flutter.
@@ -19,7 +19,7 @@ Pod::Spec.new do |s|
   s.source_files = 'Classes/**/*'
   s.public_header_files = 'Classes/**/*.h'
   s.dependency 'Flutter'
-  s.dependency 'MMKV', '>= 1.2.10'
+  s.dependency 'MMKV', '>= 1.2.11'
   s.platform = :ios, '9.0'
 
 # Flutter.framework does not contain a i386 slice.
diff --git a/flutter/pubspec.lock b/flutter/pubspec.lock
index 443c75c4..250eaf8e 100644
--- a/flutter/pubspec.lock
+++ b/flutter/pubspec.lock
@@ -7,14 +7,14 @@ packages:
       name: _fe_analyzer_shared
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "22.0.0"
+    version: "30.0.0"
   analyzer:
     dependency: transitive
     description:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.1"
+    version: "2.7.0"
   args:
     dependency: transitive
     description:
@@ -28,7 +28,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.6.1"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -49,7 +49,7 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   cli_util:
     dependency: transitive
     description:
@@ -137,13 +137,20 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.2"
   glob:
     dependency: transitive
     description:
       name: glob
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.2"
   http_multi_server:
     dependency: transitive
     description:
@@ -192,7 +199,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.7.0"
   mime:
     dependency: transitive
     description:
@@ -227,7 +234,7 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.4"
+    version: "2.0.5"
   path_provider_linux:
     dependency: transitive
     description:
@@ -290,7 +297,7 @@ packages:
       name: process
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.2.3"
+    version: "4.2.4"
   pub_semver:
     dependency: transitive
     description:
@@ -386,21 +393,21 @@ packages:
       name: test
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.16.8"
+    version: "1.17.10"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.0"
+    version: "0.4.2"
   test_core:
     dependency: transitive
     description:
       name: test_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.19"
+    version: "0.4.0"
   typed_data:
     dependency: transitive
     description:
@@ -421,14 +428,14 @@ packages:
       name: vm_service
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.2.0"
+    version: "7.3.0"
   watcher:
     dependency: transitive
     description:
       name: watcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.1"
   web_socket_channel:
     dependency: transitive
     description:
@@ -465,5 +472,5 @@ packages:
     source: hosted
     version: "3.1.0"
 sdks:
-  dart: ">=2.13.0 <3.0.0"
-  flutter: ">=2.0.0"
+  dart: ">=2.14.0 <3.0.0"
+  flutter: ">=2.5.0"