diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2f3454caaa8604f39da9b8c6cf7fad9138ae0594..d13b0e879bbca24271a9b93ed001000359501631 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -47,6 +47,7 @@ pages:
     - documentation
   before_script:
     - pip install pipenv
+    - pipenv install
   script:
     - mkdir $CI_PROJECT_DIR/docs/aircraft-xml
     - python $CI_PROJECT_DIR/scripts/document_aircraft_xml.py --title General --level 1 $CI_PROJECT_DIR/scripts/CSR-02.xml > $CI_PROJECT_DIR/docs/aircraft-xml/general.md