diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 81496e2..bd81102 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -27,10 +27,10 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v7.0.1
+      uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
     - name: Setup .NET SDK
-      uses: actions/setup-dotnet@v6.0.0
+      uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
       with:
         # dotnet-version: 8.x
         dotnet-version: 8.x
@@ -78,7 +78,7 @@ jobs:
 
     - name: Upload artifact
       if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && github.ref_name == 'main'
-      uses: actions/upload-pages-artifact@v5.0.0
+      uses: actions/upload-pages-artifact@fc324d3547104276b827a68afc52ff2a11cc49c9 # v5.0.0
       with:
         path: artifacts/publish/DeveloperKorea.WebApp/release/wwwroot
 
@@ -98,4 +98,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v5.0.0
+        uses: actions/deploy-pages@368f82528645a54fb793d4d04e342629a3f51346 # v5.0.1