diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 692704a..b3922c6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -47,7 +47,7 @@ jobs:
         pip uninstall -y "jupyterlab_pyflyby" jupyterlab
 
     - name: Upload extension packages
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: extension-artifacts
         path: dist/jupyterlab_pyflyby*