fix for readthedocs#1612

using the never_cache decorator should set `Expires` to now

readthedocs/projects/views/public.py

@@ -15,7 +15,7 @@
 from django.http import HttpResponse, HttpResponseRedirect, Http404
 from django.shortcuts import get_object_or_404, render_to_response
 from django.template import RequestContext
-from django.views.decorators.cache import cache_control
+from django.views.decorators.cache import never_cache
 from django.views.generic import ListView, DetailView
 
 from taggit.models import Tag
@@ -101,7 +101,7 @@ def get_context_data(self, **kwargs):
         return context
 
 
-@cache_control(no_cache=True)
+@never_cache
 def project_badge(request, project_slug):
     """Return a sweet badge for the project"""
     version_slug = request.GET.get('version', LATEST)