diff --git a/.github/workflows/ax.yml b/.github/workflows/ax.yml
index be512fbc2c..4e56d3d721 100644
--- a/.github/workflows/ax.yml
+++ b/.github/workflows/ax.yml
@@ -160,7 +160,7 @@ jobs:
     - name: build
       run: ./ci/build.sh -v --components=axgr --target=openvdb_ax_grammar --cargs=\"-DOPENVDB_AX_GRAMMAR_NO_LINES=ON\"
     - name: upload grammar
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: ax_grammar
         path: ./build/openvdb_ax/openvdb_ax/openvdb_ax/grammar
diff --git a/.github/workflows/weekly.yml b/.github/workflows/weekly.yml
index 747c8af744..57dec07ec8 100644
--- a/.github/workflows/weekly.yml
+++ b/.github/workflows/weekly.yml
@@ -589,7 +589,7 @@ jobs:
         -strict
         -extended
     - name: upload_report
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       if: always()
       with:
         name: abi_report