diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6347686..03df3a8 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -41,7 +41,7 @@ jobs:
           CONDA_EXE: mamba
 
       - name: upload coverage reports to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
 
       - name: list files
         run: ls -l .