diff --git a/.github/workflows/corpus-diff.yml b/.github/workflows/corpus-diff.yml
index 07ff734..1e0e031 100644
--- a/.github/workflows/corpus-diff.yml
+++ b/.github/workflows/corpus-diff.yml
@@ -74,7 +74,7 @@ jobs:
       # step changes what it keeps.
       - name: Cache corpus
         id: cache-corpus
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: corpus
           key: wp-corpus-${{ env.WP_CORPUS_TAG }}-php-all