diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c86b8f7..75d977c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -27,10 +27,11 @@ jobs:
         pytest test/
     
     - name: Upload coverage to Codecov  
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
       with:
         file: ./coverage.xml
         flags: unittests
         name: codecov-umbrella
         fail_ci_if_error: true
-          
\ No newline at end of file