diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 261deaf804617540db57240514aa13beee33058e..bd351adf82f1a641a1c84515116f035b42906ebf 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,6 +2,7 @@ make:
     image: sphinxdoc/sphinx
     script:
         - pip3 install sphinx-rtd-theme
+        - pip3 install sphinx-autoapi
         - cd doc
         - make html
         - eval $(ssh-agent)