diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index d714e5bb..32ec301f 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
       - name: install build prereqs
@@ -47,7 +47,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
           allow-prereleases: true
diff --git a/.github/workflows/test-on-downstream-projects.yaml b/.github/workflows/test-on-downstream-projects.yaml
index b31662b1..23a31ca0 100644
--- a/.github/workflows/test-on-downstream-projects.yaml
+++ b/.github/workflows/test-on-downstream-projects.yaml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
       - run: python -m pip install tox
@@ -43,7 +43,7 @@ jobs:
       # NOTE: be sure to use a python version supported by mailman tests
       # at time of writing, this can be seen in the mailman test matrix:
       # https://gitlab.com/mailman/mailman/-/blob/master/tox.ini
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - run: python -m pip install tox