diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 850a1d6..b9e4e50 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: deps
         run: |
@@ -41,7 +41,7 @@ jobs:
           compiler: { CC: "gcc", CXX: "g++" }
     runs-on: ${{ matrix.platform }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         submodules: 'true'
     - name: Enable ASan+UBSan Sanitizers
@@ -81,7 +81,7 @@ jobs:
           - "3.11"
     runs-on: ${{ matrix.platform }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python }}
@@ -108,7 +108,7 @@ jobs:
         build-shared: ["0", "1"]
     runs-on: windows-2019
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         submodules: 'true'
     - name: Enable ASan Sanitizers
@@ -153,7 +153,7 @@ jobs:
           - "3.11"
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index adb59b6..94a87f4 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,7 +10,7 @@ jobs:
     name: upload release to PyPI
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - uses: actions/setup-python@v5
       with: