diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index cbcfaeb36..05f4b5c27 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -35,7 +35,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 4d536a7ab..9897436da 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 4bd2b0b54..3ace03a2a 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Ruff
       uses: astral-sh/ruff-action@v3
       with:
diff --git a/.github/workflows/pypi-publish.yml b/.github/workflows/pypi-publish.yml
index 7f42b651a..59360ec38 100644
--- a/.github/workflows/pypi-publish.yml
+++ b/.github/workflows/pypi-publish.yml
@@ -37,7 +37,7 @@ jobs:
       build: ${{ steps.check_build_trigger.outputs.build }}
     steps:
     - name: Checkout source code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         ref: ${{ github.event.pull_request.head.sha }}
     - id: check_build_trigger
@@ -56,7 +56,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
diff --git a/.github/workflows/pypi-test.yml b/.github/workflows/pypi-test.yml
index a369525fa..0c8bb513a 100644
--- a/.github/workflows/pypi-test.yml
+++ b/.github/workflows/pypi-test.yml
@@ -16,7 +16,7 @@ jobs:
         python-version: ["3.12"]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 11e97ac4b..10a9148e6 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -33,7 +33,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with: