diff --git a/.github/workflows/checks.yaml b/.github/workflows/checks.yaml
index 1ead77c..72f24fb 100644
--- a/.github/workflows/checks.yaml
+++ b/.github/workflows/checks.yaml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v5.0.0
         with:
           fetch-depth: 2
       - name: Set up Python 3.13
diff --git a/.github/workflows/primer.yaml b/.github/workflows/primer.yaml
index c3aa6c5..21ec177 100644
--- a/.github/workflows/primer.yaml
+++ b/.github/workflows/primer.yaml
@@ -12,11 +12,11 @@ jobs:
     permissions: write-all
     steps:
       - name: Check out working version
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v5.0.0
         with:
           fetch-depth: 2
       - name: Check out changeable version
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v5.0.0
         with:
           path: program_to_test
           fetch-depth: 0
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 5153f86..722489b 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -14,7 +14,7 @@ jobs:
       id-token: write
     steps:
       - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v5.0.0
       - name: Set up Python 3.x
         uses: actions/setup-python@v5
         with:
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index ca617b9..f8c0522 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -16,7 +16,7 @@ jobs:
         python-version: [3.9, "3.10", "3.11", "3.12", "3.13"]
     steps:
       - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v5.0.0
       - name: Set up Python ${{ matrix.python-version }}
         id: python
         uses: actions/setup-python@v5
@@ -42,7 +42,7 @@ jobs:
         python-version: [3.9, "3.10", "3.11", "3.12", "3.13"]
     steps:
       - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v5.0.0
       - name: Set temp directory
         run: echo "TEMP=$env:USERPROFILE\AppData\Local\Temp" >> $env:GITHUB_ENV
         # Workaround to set correct temp directory on Windows
@@ -69,7 +69,7 @@ jobs:
     needs: ["tests-linux", "tests-windows"]
     steps:
       - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v5.0.0
       - name: Set up Python 3.11
         id: python
         uses: actions/setup-python@v5