diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index b427989..2e7f7ea 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -39,7 +39,7 @@ jobs:
         ./run_tests.sh
 
     - name: Upload PDF artifacts
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: test-PDFs
         path: test/*.pdf