diff --git a/.github/workflows/test_pr.yml b/.github/workflows/test_pr.yml
index 3a1307a3..b466b03f 100644
--- a/.github/workflows/test_pr.yml
+++ b/.github/workflows/test_pr.yml
@@ -16,7 +16,7 @@ jobs:
     name: Test Py3.11
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.11'
@@ -29,7 +29,7 @@ jobs:
     name: Test Py3.10
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.10'
@@ -42,7 +42,7 @@ jobs:
     name: Test Py3.9
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.9'
@@ -55,7 +55,7 @@ jobs:
     name: pytype 3.10
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.10'
@@ -69,7 +69,7 @@ jobs:
     name: Check format with black
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.11'