diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 825ab129..73cf6da4 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -30,7 +30,7 @@ jobs:
     timeout-minutes: 5
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -51,7 +51,7 @@ jobs:
           - "3.12"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Run tox
         uses: lsst-sqre/run-tox@v1
@@ -75,7 +75,7 @@ jobs:
       || startsWith(github.head_ref, 'tickets/')
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0  # full history for setuptools_scm
 
@@ -93,7 +93,7 @@ jobs:
     timeout-minutes: 10
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0 # full history for setuptools_scm
 
@@ -117,7 +117,7 @@ jobs:
     needs: [lint, test, docs]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0 # full history for setuptools_scm
 
@@ -145,7 +145,7 @@ jobs:
     if: github.event_name == 'release' && github.event.action == 'published'
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0 # full history for setuptools_scm
 
diff --git a/.github/workflows/periodic-ci.yaml b/.github/workflows/periodic-ci.yaml
index 9a3f5233..43a52f30 100644
--- a/.github/workflows/periodic-ci.yaml
+++ b/.github/workflows/periodic-ci.yaml
@@ -26,7 +26,7 @@ jobs:
           - "3.12"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Run tests in tox
         uses: lsst-sqre/run-tox@v1
@@ -42,7 +42,7 @@ jobs:
     timeout-minutes: 10
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0 # full history for setuptools_scm
 
@@ -64,7 +64,7 @@ jobs:
     needs: [test, docs]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0 # full history for setuptools_scm