diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 947671f..8d353a2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
     steps:
 
       - name: Checkout Code Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Set up Python 3.8
         uses: actions/setup-python@v2
@@ -42,7 +42,7 @@ jobs:
     steps:
 
       - name: Checkout Code Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       
 
       - name: Set up Python 3.8