diff --git a/.github/workflows/subsplit.yaml b/.github/workflows/subsplit.yaml
index 6dd603cac1c..c35003d8ac4 100644
--- a/.github/workflows/subsplit.yaml
+++ b/.github/workflows/subsplit.yaml
@@ -22,7 +22,7 @@ jobs:
           user_email: 'ceesjank@gmail.com'
       - name: Cache splitsh-lite
         id: splitsh-cache
-        uses: actions/cache@v4
+        uses: actions/cache@0400d5f644dc74513175e3cd8d07132dd4860809 # v4.2.4
         with:
           path: './.splitsh'
           key: '${{ runner.os }}-splitsh-d-101'