diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 56f7f258b69cdf67a95ca3744f72716ac3772704..7a5810044df5814aa3c2ed7202d76cddf25c7994 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,7 +6,7 @@ pages:
   script:
   - pip install -U sphinx
   - pip install sphinx-rtd-theme
-  - pip install numpy biopython matplotlib
+  - pip install numpy biopython matplotlib scikit-learn
   - sphinx-build -b html docs/source public
   artifacts:
     paths: