Update README.md

Author: tomchristie

README.md

@@ -36,7 +36,7 @@ There is a live example API for testing purposes, [available here][sandbox].
 # Requirements
 
 * Python (2.6.5+, 2.7, 3.2, 3.3, 3.4)
-* Django (1.4.11+, 1.5.6+, 1.6.3+, 1.7+, 1.8)
+* Django (1.4.11+, 1.5.6+, 1.6.3+, 1.7, 1.8)
 
 # Installation