diff --git a/conntrackt/views.py b/conntrackt/views.py
--- a/conntrackt/views.py
+++ b/conntrackt/views.py
@@ -256,7 +256,7 @@ def entity_iptables(request, pk):
     # content.
     entity = get_object_or_404(Entity, pk=pk)
     content = generate_entity_iptables(entity)
-    response = HttpResponse(content, mimetype='text/plain')
+    response = HttpResponse(content, content_type='text/plain')
 
     # Add the Content-Disposition information for the browser, telling the
     # browser to download the file with suggested filename.
@@ -299,7 +299,7 @@ def project_iptables(request, project_id
 
     # Create the response object, setting the mime type so browser could offer
     # to open the file with program as well.
-    response = HttpResponse(mimetype='application/zip')
+    response = HttpResponse(content_type='application/zip')
 
     # If specific location was specified, get the entities that are part of that
     # project location only, otherwise fetch all of the project's entities. Also
@@ -1005,7 +1005,7 @@ def project_diagram(request, pk):
     content = generate_project_diagram(project).create_svg()
 
     # Set the mime type.
-    response = HttpResponse(content, mimetype='image/svg+xml')
+    response = HttpResponse(content, content_type='image/svg+xml')
 
     # Return the response object.
     return response
@@ -1129,7 +1129,7 @@ class APISearchView(MultiplePermissionsR
 
         # Generate the JSON response.
         content = json.dumps(items)
-        response = HttpResponse(content, mimetype="application/json")
+        response = HttpResponse(content, content_type="application/json")
 
         # Return the response.
         return response