diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c6ff61f0362fca1091231e7d75ef93f82c930f6d..1c5099fd73d11da82ee9ca6f0f267beedafdc907 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -66,6 +66,7 @@ mkdocs:
   before_script:
   - source /opt/.venv3/bin/activate
   - python -V # debug
+  - pip install -r requirements.txt
   - pip freeze # debug
   - mkdocs -V # debug
   script: