diff --git a/.travis.yml b/.travis.yml
index 2168c4f5..bf5c35f1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ language: php
 php:
   - 5.3
   - 5.4
+  - 5.5
 
 before_script:
   - curl -s http://getcomposer.org/installer | php -- --quiet
diff --git a/README.md b/README.md
index a55b9558..53174ab3 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,7 @@ and install the latest version of the Uuid library into your project:
 ```json
 {
     "require": {
-        "rhumsaa/uuid": "2.0.*"
+        "rhumsaa/uuid": "~2.1"
     }
 }
 ```
diff --git a/composer.json b/composer.json
index 0a8abb67..7e54b592 100644
--- a/composer.json
+++ b/composer.json
@@ -36,7 +36,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-master": "2.0.x-dev"
+            "dev-master": "2.1.x-dev"
         }
     }
 }