diff --git a/.github/workflows/build_tests.yml b/.github/workflows/build_tests.yml
index 28f5edbb3..e964aaff2 100644
--- a/.github/workflows/build_tests.yml
+++ b/.github/workflows/build_tests.yml
@@ -87,7 +87,7 @@ jobs:
       run: |
         python -m pytest --durations=20 -v test/ ot/ --doctest-modules --color=yes --cov=./ --cov-report=xml
     - name: Upload coverage reports to Codecov with GitHub Action
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
 
   linux-minimal-deps:
 
@@ -110,8 +110,6 @@ jobs:
     - name: Run tests
       run: |
         python -m pytest --durations=20 -v test/ ot/ --color=yes --cov=./ --cov-report=xml
-    - name: Upload coverage reports to Codecov with GitHub Action
-      uses: codecov/codecov-action@v3
 
   macos:
      runs-on: ${{ matrix.os }}
diff --git a/RELEASES.md b/RELEASES.md
index cdabf416d..1660913cd 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -20,6 +20,7 @@ This new release adds support for sparse cost matrices and a new lazy EMD solver
 - Fix device for batch Ot solver in `ot.batch` (PR #784, Issue #783)
 - Fix openmp flags on macOS (PR #789)
 - Clean documentation (PR #787)
+- Fix code coverage (PR #791)
 
 
 ## 0.9.6.post1