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-rw-r--r--app/controllers/custom_css_controller.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/app/controllers/custom_css_controller.rb b/app/controllers/custom_css_controller.rb
index 7f4dcfcfe..e3f67bd14 100644
--- a/app/controllers/custom_css_controller.rb
+++ b/app/controllers/custom_css_controller.rb
@@ -6,7 +6,7 @@ class CustomCssController < ApplicationController
   before_action :set_cache_headers
 
   def show
-    expires 3.minutes, public: true
+    expires_in 3.minutes, public: true
     render plain: Setting.custom_css || '', content_type: 'text/css'
   end
 end