diff --git a/boards/forms/__init__.py b/boards/forms/__init__.py
--- a/boards/forms/__init__.py
+++ b/boards/forms/__init__.py
@@ -97,7 +97,7 @@ class FormatPanel(forms.Textarea):
     form text area.
     """
 
-    def render(self, name, value, attrs=None):
+    def render(self, name, value, attrs=None, renderer=None):
         output_template = '<div id="mark-panel">{}</div>'
 
         buttons = [self._get_button(formatter) for formatter in formatters]
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ simplejson
 pytube
 requests
 pillow
-django>=1.8,<2.1
+django>=1.8
 bbcode
 django-debug-toolbar
 pytz