diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 3cafac0..cd77f7f 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -33,7 +33,7 @@ jobs:
           extensions: bcmath, mbstring, intl, sodium, json
 
       - name: "caching dependencies"
-        uses: "actions/cache@v2"
+        uses: "actions/cache@v2.1.4"
         with:
           path: |
             ~/.composer/cache