diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 102679d..a610176 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -58,11 +58,12 @@ jobs:
           gcovr --sonarqube coverage.xml -r ..
 
       - name: Upload Codecov.io
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@e28ff129e5465c2c0dcc6f003fc735cb6ae0c673 # v4.5.0
         with:
           directory:        .
+          flags:            unittests
           fail_ci_if_error: true
-
+            
      # - name: Upload SonarCloud
      #   run: |
      #     build/sonar-scanner/bin/sonar-scanner -Dsonar.host.url=https://sonarcloud.io -Dproject.settings=.sonar-project.properties -Dsonar.login=${{ secrets.SONAR_TOKEN }}