diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8c81901..afbcd5b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,7 +7,7 @@ jobs:
   robot_report:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: install ROBOT
         run: |
           wget --quiet https://github.com/ontodev/robot/releases/download/v1.8.1/robot.jar
@@ -30,7 +30,7 @@ jobs:
           robot report --profile .github/report_profile.txt --input dfgfo.ttl --output report-ttl.txt
           robot report --profile .github/report_profile.txt --input dfgfo.owl --output report-owl.txt
       - name: report artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: robot_reports
           path: report-*.txt
\ No newline at end of file