diff --git a/app/controllers/oauth/authorizations_controller.rb b/app/controllers/oauth/authorizations_controller.rb
index 45073c968..5449cfb1a 100644
--- a/app/controllers/oauth/authorizations_controller.rb
+++ b/app/controllers/oauth/authorizations_controller.rb
@@ -7,6 +7,10 @@ class Oauth::AuthorizationsController < Doorkeeper::AuthorizationsController
   before_action :authenticate_resource_owner!
   before_action :set_cache_headers
 
+  content_security_policy do |p|
+    p.form_action(false)
+  end
+
   include Localized
 
   private