diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ba807af..56a61a8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: set up go
         uses: actions/setup-go@v5
         with:
@@ -29,7 +29,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: set up go
         uses: actions/setup-go@v5
         with:
@@ -57,7 +57,7 @@ jobs:
           - windows-2022
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: set up go
         uses: actions/setup-go@v5
         with:
@@ -84,7 +84,7 @@ jobs:
   coverage:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: set up go
         uses: actions/setup-go@v5
         with: