diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index da50381..f7cdbfc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,7 +16,7 @@ jobs:
           submodules: true
       - name: Build PDF
         run: make pdf
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: pdf
           path: out/*.pdf