diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d8b54f17..78552b46 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
           - 6379:6379
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
 
       - name: update apt
         run: sudo apt-get update -y
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 6739bd34..f44cec5c 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Publish Documentation
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
       - name: Set up Python
         uses: actions/setup-python@v4
         with: