diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f46db24a9..ef40f829f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}