diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 82c19c6..efb3301 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,7 +15,7 @@ jobs:
       # cache busting if requirements haven't changed
       CACHE_EPOCH: 1
     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/git_checks.yml b/.github/workflows/git_checks.yml
index 4e91c56..70c8c81 100644
--- a/.github/workflows/git_checks.yml
+++ b/.github/workflows/git_checks.yml
@@ -18,7 +18,7 @@ jobs:
     name: Find merge conflicts
     steps:
       # Checkout the source code so we have some files to look at.
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       # Run the actual merge conflict finder
     - name: Merge Conflict finder
       uses: olivernybroe/action-conflict-finder@v4.1