diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index fa05d1525e88eacb39f75efbb048cefae478668a..1b0ee4a6bee0c1be15ab4ed75b132fe7db8247d0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -86,7 +86,7 @@ wheel:cp37-cp37m-macosx:
       FROM python:${CI_JOB_NAME#*python}
       COPY requirements.txt .
       RUN apt-get update -qq && apt-get -y install --no-install-recommends libchealpix-dev libgsl0-dev pkg-config && rm -rf /var/lib/apt/lists/*
-      RUN pip --no-cache-dir install pytest-astropy pytest-xdist pytest-cov gcovr pycobertura sphinx sphinx-argparse flake8
+      RUN pip --no-cache-dir install pytest-astropy pytest-xdist pytest-cov gcovr pycobertura sphinx sphinx-argparse sphinx-astropy flake8
       RUN pip --no-cache-dir install -r requirements.txt
       RUN rm -f requirements.txt
       EOF