diff --git a/.github/workflows/mainline-compile.yml b/.github/workflows/mainline-compile.yml
index 01734a9..5825103 100644
--- a/.github/workflows/mainline-compile.yml
+++ b/.github/workflows/mainline-compile.yml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: true
           fetch-depth: 0
diff --git a/.github/workflows/mainline-format.yml b/.github/workflows/mainline-format.yml
index ba0cb5f..b038cee 100644
--- a/.github/workflows/mainline-format.yml
+++ b/.github/workflows/mainline-format.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: true
 
diff --git a/.github/workflows/mainline-prepare.yml b/.github/workflows/mainline-prepare.yml
index 443db96..af13da2 100644
--- a/.github/workflows/mainline-prepare.yml
+++ b/.github/workflows/mainline-prepare.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Log in to GHCR
         uses: docker/login-action@v3