diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index d5a524f..fb4e791 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -21,7 +21,7 @@ jobs:
       #    java-version: '19'
 
       - name: Cache Widoco
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: jar
           key: ${{ env.WIDOCO_DOWNLOAD_URL }}