diff --git a/Casks/c/coteditor.rb b/Casks/c/coteditor.rb
index 989708efa6..bbe3d11e11 100644
--- a/Casks/c/coteditor.rb
+++ b/Casks/c/coteditor.rb
@@ -77,9 +77,12 @@ cask "coteditor" do
   app "CotEditor.app"
   binary "#{appdir}/CotEditor.app/Contents/SharedSupport/bin/cot"
 
+  uninstall quit: "com.coteditor.CotEditor"
+
   zap trash: [
     "~/Library/Application Scripts/com.coteditor.CotEditor",
     "~/Library/Application Support/com.apple.sharedfilelist/com.apple.LSSharedFileList.ApplicationRecentDocuments/com.coteditor.coteditor.sfl*",
+    "~/Library/Caches/com.apple.helpd/Generated/com.coteditor.CotEditor.help*",
     "~/Library/Caches/com.apple.helpd/SDMHelpData/Other/English/HelpSDMIndexFile/com.coteditor.CotEditor.help*",
     "~/Library/Caches/com.apple.helpd/SDMHelpData/Other/Japanese/HelpSDMIndexFile/com.coteditor.CotEditor.help*",
     "~/Library/Containers/com.coteditor.CotEditor",