Fixing the version number for Django rest Framework

setup.py

@@ -22,7 +22,7 @@ setup(name='political-memory',
         'django-rql-filter>=0.1.3,<0.2',
         'django-taggit>=0.17,<0.18',
         'django>=1.8,<1.9',
-        'djangorestframework>=3,<4',
+        'djangorestframework>=3,<3.5.1',
         'hamlpy>=0.82,<0.83',
         'ijson>=2.2,<2.3',
         'python-dateutil>=2.4,<2.5',