diff --git a/CHANGELOG.md b/CHANGELOG.md
index eecdf84..249c2f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,14 +1,18 @@
+## 0.2.2-beta
+
+Change medium creationDate and modifiedDate precision from second to millisecond on iOS platform.
+
 ## 0.2.1-beta
 
-Add video duration attribute in Medium
+Add video duration attribute in Medium.
 
 ## 0.2.0+1
 
-Release 0.2.0+1
+Release 0.2.0+1.
 
 ## 0.1.1+1
 
-Remove transparent_image dependency out of plugin
+Remove transparent_image dependency out of plugin.
 
 ## 0.1.0+1
 
diff --git a/example/pubspec.lock b/example/pubspec.lock
index ee66ede..ff57ce4 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -129,7 +129,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.2.1-beta"
+    version: "0.2.2-beta"
   plugin_platform_interface:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index 80bff19..ad1dd8e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: photo_gallery
 description: A Flutter plugin that retrieves images and videos from mobile native gallery.
-version: 0.2.1-beta
+version: 0.2.2-beta
 repository: https://github.com/Firelands128/photo_gallery
 
 environment: