diff --git a/README.md b/README.md
index d90aeea..63e1ae3 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,10 @@ In order to use this package you need to get [OAuth Generic Access Token](https:
 Instalation
 ===========
 
+Warning this is v3 version of bitly4laravel package. 
+
+If you want to use the old v2 version use the v2 branch.
+
 Add bitly4laravel to your composer.json file.
 
     require : {