diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b6501827a80de2bd3a9c1d8f856c4eecbba933ce..fd24f7bb8d84f41ea400ee0dd5aeb84eb1bbb8a6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -27,7 +27,7 @@ doxygen:
   before_script:
     - apt-get update && apt-get install -y doxygen
   script:
-    - git clone -b feature-aircraftGeometry2 https://gitlab-ci-token:${CI_JOB_TOKEN}@git.rwth-aachen.de/unicado/libraries
+    - git clone -b feature-aircraftGeometry2 --recurse-submodules https://gitlab-ci-token:${CI_JOB_TOKEN}@git.rwth-aachen.de/unicado/libraries
     - cd libraries/aircraftGeometry2/doc/ && ( cat Doxyfile ; echo "OUTPUT_DIRECTORY = $CI_PROJECT_DIR/docs/modules/" ) | doxygen -
   artifacts:
     paths: