diff --git a/Casks/firefox-ja.rb b/Casks/firefox-ja.rb
index 636d450a9..949e4285c 100644
--- a/Casks/firefox-ja.rb
+++ b/Casks/firefox-ja.rb
@@ -1,6 +1,6 @@
 cask :v1 => 'firefox-ja' do
   version '41.0'
-  sha256 'e3317d398d4d8ac8dcde5b04c22da1e2881fcd061d8a88f73a2a3eac5c329211'
+  sha256 'c58798d56bd2b93e15c5c36feb998530cc33597821f37aaecaa5c41264297517'
 
   url "https://download.mozilla.org/?product=firefox-#{version}-SSL&os=osx&lang=ja-JP-mac"
   name 'Firefox'