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-rw-r--r--config/application.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/config/application.rb b/config/application.rb
index 92aecc8fc..552f4ec11 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -38,7 +38,9 @@ module Mastodon
     end
 
     config.action_dispatch.default_headers = {
-      'X-Frame-Options' => 'DENY'
+      'X-Frame-Options' => 'DENY',
+      'X-Content-Type-Options' => 'nosniff',
+      'X-XSS-Protection' => '1; mode=block'
     }
   end
 end