diff --git a/.github/workflows/backend-ci.yml b/.github/workflows/backend-ci.yml
index 84c33e3..41f1055 100644
--- a/.github/workflows/backend-ci.yml
+++ b/.github/workflows/backend-ci.yml
@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index c0f8edc..2fc9e62 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -16,7 +16,7 @@ jobs:
       security-events: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v4
@@ -36,7 +36,7 @@ jobs:
       security-events: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
diff --git a/.github/workflows/frontend-ci.yml b/.github/workflows/frontend-ci.yml
index 1a55149..3cac9f9 100644
--- a/.github/workflows/frontend-ci.yml
+++ b/.github/workflows/frontend-ci.yml
@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v4