diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e8456540cf2097f73ddb8e9ecddac79cb6a00050..072f30081a06ff39f72a985a4da4ed6d420016fd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -85,7 +85,7 @@ unit-test-job:   # This job runs in the test stage.
 
 pages-job:
   script:
-    - pip install sphinx sphinx-rtd-theme
+    - pip install sphinx sphinx-rtd-theme m2r2
     - cd docs
     - make html
     - mv build/html/ ../public/