diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a5f2892..02ab2c0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
 
     steps:
       - name: Checkout git repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
@@ -32,7 +32,7 @@ jobs:
 
     steps:
       - name: Checkout git repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
@@ -49,7 +49,7 @@ jobs:
 
     steps:
       - name: Checkout git repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
@@ -66,7 +66,7 @@ jobs:
 
     steps:
       - name: Checkout git repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
@@ -89,7 +89,7 @@ jobs:
 
     steps:
       - name: Checkout git repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with: