diff --git a/config.ru b/config.ru
index d201948e0..5268110ef 100644
--- a/config.ru
+++ b/config.ru
@@ -1,4 +1,11 @@
 # This file is used by Rack-based servers to start the application.
 
 require ::File.expand_path('../config/environment',  __FILE__)
+
+if defined? Unicorn
+  require_dependency 'unicorn/oob_gc'
+  GC.disable
+  use Unicorn::OobGC
+end
+
 run Danbooru::Application