diff --git a/.github/workflows/matlab_test_and_coverage.yaml b/.github/workflows/matlab_test_and_coverage.yaml
index 569eb8f..3162482 100644
--- a/.github/workflows/matlab_test_and_coverage.yaml
+++ b/.github/workflows/matlab_test_and_coverage.yaml
@@ -54,7 +54,7 @@ jobs:
         command: cd(fullfile(getenv('GITHUB_WORKSPACE'), '.github', 'workflows')); run run_tests_ci;
 
     - name: Code coverage
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         file: coverage.xml
         flags: ${{ matrix.os }}_matlab-${{ matrix.version }}
diff --git a/.github/workflows/octave_test_and_coverage.yml b/.github/workflows/octave_test_and_coverage.yml
index 7c63566..2ea187f 100644
--- a/.github/workflows/octave_test_and_coverage.yml
+++ b/.github/workflows/octave_test_and_coverage.yml
@@ -45,7 +45,7 @@ jobs:
         cover_xml_file: coverage.xml
 
     - name: Code coverage
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         file: coverage.xml
         flags: ubuntu-latest_octave