Try bumping to django 2.0

Pipfile

@@ -0,0 +1,20 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+django = "==2.0.8"
+django-auth-ldap = "==1.7.0"
+django-extensions = "==2.1.0"
+djangorestframework = "==3.8.2"
+gunicorn = "==19.9.0"
+ipaddress = "==1.0.22"
+mysqlclient = "==1.3.13"
+raven = "==6.9.0"
+django-suit = "*"
+
+[dev-packages]
+
+[requires]
+python_version = "3.6"