diff --git a/.github/workflows/pypi_publish.yml b/.github/workflows/pypi_publish.yml
index 6526b38..7c635ec 100644
--- a/.github/workflows/pypi_publish.yml
+++ b/.github/workflows/pypi_publish.yml
@@ -10,9 +10,9 @@ jobs:
   acasclient:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup python 3.8
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5
         with:
           python-version: "3.8"
       - name: Install pypa/build and twine
diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 352d892..83ea6f5 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -10,11 +10,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout acasclient
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: acasclient
       - name: Set Up Python 3.8
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: 3.8
       - name: Display Python version
@@ -38,7 +38,7 @@ jobs:
         run: |
           echo "ACAS_TAG=$(echo ${{ env.ACAS_REF }} | sed 's/\//-/g')" >> $GITHUB_ENV
       - name: Checkout ACAS
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: mcneilco/acas
           path: acas