diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 23e170f1..a4f56877 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -12,6 +12,7 @@ build-doc:
   script:
     - ./update.sh
     - . ./poezio-venv/bin/activate
+    - pip install sphinx --ignore-installed
     - make doc
     - rm -rf /www/latest
     - mv doc/build/html/ /www/latest