diff --git a/Casks/firefox-cn.rb b/Casks/firefox-zh-cn.rb
similarity index 94%
rename from Casks/firefox-cn.rb
rename to Casks/firefox-zh-cn.rb
index 16fbe3452..d8f9d207d 100644
--- a/Casks/firefox-cn.rb
+++ b/Casks/firefox-zh-cn.rb
@@ -1,4 +1,4 @@
-cask 'firefox-cn' do
+cask 'firefox-zh-cn' do
   version '43.0.3'
   sha256 '049691bc931382e4a537054b2e0c97fd43e1e5ce19de88c12b3de14cd80b53dc'