diff --git a/.github/workflows/buildMomentumSpec.yml b/.github/workflows/buildMomentumSpec.yml
index 8578be4..531cfab 100644
--- a/.github/workflows/buildMomentumSpec.yml
+++ b/.github/workflows/buildMomentumSpec.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     # Check out PR
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
     - name: Install dependencies
       run: |
           sudo apt update
@@ -24,7 +24,7 @@ jobs:
         ls -l $apath/publish
     # Upload artifact containing Momentum-netCDF
     - name: Upload cf-conventions doc preview
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v6
       with:
         name: Momentum-netCDF
         path: ./specifications/momentum/publish/Momentum-netCDF.*
diff --git a/.github/workflows/buildnc.yml b/.github/workflows/buildnc.yml
index 4146cf1..a19ab4a 100644
--- a/.github/workflows/buildnc.yml
+++ b/.github/workflows/buildnc.yml
@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           ref: ${{ github.event.pull_request.head.sha }}