diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index a2e0629..9b9b4d7 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -23,6 +23,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
+    - name: build doxygen documentation
+      run: sudo apt install -y doxygen
+      
     - name: build doxygen documentation
       run: rm -rf build || true && mkdir build && cd build && cmake .. -DLIBMBUS_BUILD_DOCS=ON && cmake --build . --target doc