diff --git a/.github/workflows/build_directory_md.yml b/.github/workflows/build_directory_md.yml
index 2c27125..3e15c78 100644
--- a/.github/workflows/build_directory_md.yml
+++ b/.github/workflows/build_directory_md.yml
@@ -16,7 +16,7 @@ jobs:
   build_directory_md:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: jiro4989/setup-nim-action@v2
         with:
diff --git a/.github/workflows/check_code_format.yml b/.github/workflows/check_code_format.yml
index 1cf495b..c3d1f19 100644
--- a/.github/workflows/check_code_format.yml
+++ b/.github/workflows/check_code_format.yml
@@ -14,7 +14,7 @@ jobs:
     name: check format code
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/nim_test.yml b/.github/workflows/nim_test.yml
index 9bddf6f..99171f7 100644
--- a/.github/workflows/nim_test.yml
+++ b/.github/workflows/nim_test.yml
@@ -23,7 +23,7 @@ jobs:
           - '2.2.6'
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: jiro4989/setup-nim-action@v2
         with:
diff --git a/.github/workflows/nim_test_cyclic.yml b/.github/workflows/nim_test_cyclic.yml
index e9d7368..169cc5f 100644
--- a/.github/workflows/nim_test_cyclic.yml
+++ b/.github/workflows/nim_test_cyclic.yml
@@ -20,7 +20,7 @@ jobs:
           - 'devel'
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: jiro4989/setup-nim-action@v2
         with: