diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 03e5fdb252a29766dd6fbf275ee987977c4012b3..dea1d2223c65bfcbc07cd785e0eb716fb9d91ef6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -48,7 +48,7 @@ pages:
         - export LANG=$(locale -a | grep en_US)
         - pip3 install --upgrade setuptools wheel packaging
         - pip3 install -e .
-        - pip3 install -e . [doc]
+        - pip3 install -e .[doc]
         - rm -Rf build
         - python3 setup.py build_sphinx
         - cp -r build/sphinx/html public