diff --git a/README.md b/README.md
index 129f8cd..14dcbaa 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ A simple serialization.
 Through [Composer](http://getcomposer.org) as [chubbyphp/chubbyphp-serialization][1].
 
 ```sh
-composer require chubbyphp/chubbyphp-serialization "~2.8"
+composer require chubbyphp/chubbyphp-serialization "~2.9"
 ```
 
 ## Usage
diff --git a/composer.json b/composer.json
index 23fb3af..5f75e3f 100644
--- a/composer.json
+++ b/composer.json
@@ -31,7 +31,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.8-dev"
+            "dev-master": "2.9-dev"
         }
     }
 }