diff --git a/.github/workflows/mrml-core-main.yml b/.github/workflows/mrml-core-main.yml
index 947bd4c1..925364ec 100644
--- a/.github/workflows/mrml-core-main.yml
+++ b/.github/workflows/mrml-core-main.yml
@@ -62,7 +62,7 @@ jobs:
         run: cargo llvm-cov --all-features --workspace --exclude mrml-python --exclude mrml-wasm --lcov --output-path lcov.info
 
       - name: upload coverage
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           files: lcov.info
           fail_ci_if_error: false