diff --git a/pwa/views.py b/pwa/views.py
index b6b7c57..6e27823 100644
--- a/pwa/views.py
+++ b/pwa/views.py
@@ -14,7 +14,7 @@ def manifest(request):
         setting_name: getattr(app_settings, setting_name)
         for setting_name in dir(app_settings)
         if setting_name.startswith('PWA_')
-    })
+    }, content_type='application/json')
 
 
 def offline(request):