diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index baab62b07..a99eb28ca 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,7 +17,7 @@ jobs:
     - name: Generate flattened sldr
       run: ldmlflatten -o flat -i sldr -a -A -g
 
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: sldr
         path: |
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index c085b5c9c..b7e484db4 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -24,7 +24,7 @@ jobs:
       with:
         ssh-private-key: ${{secrets.uploader_key}}
     # Download the artefact
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: sldr
     # Upload results