diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 76399dca06ecef6e8d3ac69eb245467782fcac2c..01a0d79e5a3e9c3bbc47235f662a3912e1060a01 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -31,6 +31,7 @@ build-documentation:
   image: i10git.cs.fau.de:5005/pycodegen/pycodegen/documentation
   script:
     - pip install mkdocs mkdocs-material mkdocstrings[python]
+    - export PYTHONPATH=`pwd`
     - mkdocs build
   tags:
     - docker