diff --git a/.github/workflows/upstream-watch.yml b/.github/workflows/upstream-watch.yml
index c93f425..171191b 100644
--- a/.github/workflows/upstream-watch.yml
+++ b/.github/workflows/upstream-watch.yml
@@ -45,7 +45,7 @@ jobs:
 
       - name: Restore last-checked cache
         id: cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .github/cache
           key: upstream-version-${{ steps.ver.outputs.version }}