diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 91056ac9106301077e0cd17f458330258d2ed4a3..e3ac6172686abdb7553e40ed9714816100708e46 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -270,7 +270,7 @@ Pylint:
 
 Documentation:
   script:
-  - EXTRA_INSTALL="pybind11 numpy mako matplotlib"
+  - EXTRA_INSTALL="pybind11 numpy mako"
   - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-docs.sh
   - ". ./build-docs.sh"
   tags: