diff --git a/lib/travis/web/app.rb b/lib/travis/web/app.rb
index 2b66842c..285d8ef9 100644
--- a/lib/travis/web/app.rb
+++ b/lib/travis/web/app.rb
@@ -131,7 +131,7 @@ class Travis::Web::App
       end
       builder.use Rack::Deflater
       builder.use Rack::Head
-      builder.use Rack::Protection::XssHeader
+      builder.use Rack::Protection::XSSHeader
       builder.use Rack::Protection::FrameOptions
       builder.use Rack::Protection::PathTraversal
       builder.use Rack::ConditionalGet