Update README.md

Author: jpadilla

README.md

@@ -17,7 +17,7 @@ XML support extracted as a third party package directly from the official Django
 
 * Python (2.7, 3.3, 3.4)
 * Django (1.6, 1.7)
-* Django REST Framework (2.4.3, 2.4.4, 3.0-beta)
+* Django REST Framework (2.4.4, 3.0, 3.1)
 
 ## Installation