diff --git a/.github/workflows/matlab_test_and_coverage.yml b/.github/workflows/matlab_test_and_coverage.yml
index 5088169..12be4fb 100644
--- a/.github/workflows/matlab_test_and_coverage.yml
+++ b/.github/workflows/matlab_test_and_coverage.yml
@@ -62,7 +62,7 @@ jobs:
       if: matrix.os == 'ubuntu-latest' || matrix.os == 'macos-latest'
       # no coverage on windows as long as MOcov does not support it
       # see https://github.com/MOcov/MOcov/issues/28
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v5
       with:
         file: coverage.xml   # optional
         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 b604bff..a29b3ae 100644
--- a/.github/workflows/octave_test_and_coverage.yml
+++ b/.github/workflows/octave_test_and_coverage.yml
@@ -26,7 +26,7 @@ jobs:
         cover_xml_file: coverage.xml
 
     - name: Code coverage
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v5
       with:
         token: ${{ secrets.CODECOV_TOKEN }}   # not required for public repos
         file: coverage.xml   # optional