diff --git a/.github/workflows/ci-fastapi.yml b/.github/workflows/ci-fastapi.yml
index fdcfb4c5..e5cc8f8b 100644
--- a/.github/workflows/ci-fastapi.yml
+++ b/.github/workflows/ci-fastapi.yml
@@ -24,7 +24,7 @@ jobs:
 
       # 3. Harbor 로그인
       - name: Login to Harbor
-        uses: docker/login-action@v4
+        uses: docker/login-action@v4.5.2
         with:
           registry: amdp-registry.skala-ai.com
           username: ${{ secrets.HARBOR_USERNAME }}
diff --git a/.github/workflows/ci-frontend.yml b/.github/workflows/ci-frontend.yml
index 74216e92..b20abd30 100644
--- a/.github/workflows/ci-frontend.yml
+++ b/.github/workflows/ci-frontend.yml
@@ -24,7 +24,7 @@ jobs:
 
       # 3. Harbor 로그인
       - name: Login to Harbor
-        uses: docker/login-action@v4
+        uses: docker/login-action@v4.5.2
         with:
           registry: amdp-registry.skala-ai.com
           username: ${{ secrets.HARBOR_USERNAME }}
diff --git a/.github/workflows/ci-springboot.yml b/.github/workflows/ci-springboot.yml
index a5064751..d5c6b6c5 100644
--- a/.github/workflows/ci-springboot.yml
+++ b/.github/workflows/ci-springboot.yml
@@ -24,7 +24,7 @@ jobs:
 
       # 3. Harbor 로그인
       - name: Login to Harbor
-        uses: docker/login-action@v4
+        uses: docker/login-action@v4.5.2
         with:
           registry: amdp-registry.skala-ai.com
           username: ${{ secrets.HARBOR_USERNAME }}