diff --git a/.github/workflows/continuous-delivery.yaml b/.github/workflows/continuous-delivery.yaml
index 774df406e..96b2db72b 100644
--- a/.github/workflows/continuous-delivery.yaml
+++ b/.github/workflows/continuous-delivery.yaml
@@ -22,7 +22,7 @@ jobs:
         with:
           node-version: 12
       - name: Cache npm dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           key: npm-${{ hashFiles('package-lock.json') }}
           path: ~/.npm
diff --git a/.github/workflows/continuous-integration.yaml b/.github/workflows/continuous-integration.yaml
index e7780d64c..8f4210acc 100644
--- a/.github/workflows/continuous-integration.yaml
+++ b/.github/workflows/continuous-integration.yaml
@@ -29,7 +29,7 @@ jobs:
         with:
           node-version: 12
       - name: Cache npm dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           key: npm-${{ hashFiles('package-lock.json') }}
           path: ~/.npm
@@ -59,7 +59,7 @@ jobs:
         with:
           node-version: 12
       - name: Cache npm dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           key: npm-${{ hashFiles('package-lock.json') }}
           path: ~/.npm
@@ -82,7 +82,7 @@ jobs:
         with:
           node-version: 12
       - name: Cache npm dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           key: npm-${{ hashFiles('package-lock.json') }}
           path: ~/.npm
@@ -105,7 +105,7 @@ jobs:
         with:
           node-version: 12
       - name: Cache npm dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           key: npm-${{ hashFiles('package-lock.json') }}
           path: ~/.npm
@@ -139,7 +139,7 @@ jobs:
         # https://github.com/actions/cache/issues/187 is fixed.
         if: runner.os == 'Linux'
         name: Cache npm dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           path: ${{ steps.npm-cache.outputs.dir }}
           key: |