diff --git a/.github/workflows/release-tip.yml b/.github/workflows/release-tip.yml
index 5857077d8..787057eb3 100644
--- a/.github/workflows/release-tip.yml
+++ b/.github/workflows/release-tip.yml
@@ -185,7 +185,7 @@ jobs:
           SPARKLE_KEY: ${{ secrets.PROD_MACOS_SPARKLE_KEY }}
         run: |
           echo $SPARKLE_KEY > signing.key
-          sign_update -f signing.key src/App.zig > sign_update.txt
+          sign_update -f signing.key ghostty-macos-universal.zip > sign_update.txt
           curl -L https://tip.files.ghostty.dev/appcast.xml > appcast.xml
           python3 ./dist/macos/update_appcast_tip.py
           test -f appcast_new.xml