diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7172e4f6274d68a60f8b7af95a19e64f922f11a9..316909cb207b23926981d903e2696da343a050f1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -30,12 +30,13 @@ tests:
 
 documentation:
   stage: test
-  image: sphinxdoc/sphinx
+  image: sphinxdoc/sphinx-latexpdf@sha256:f80e48ac46a14736795e561e79a2fa43835a5aaa2cfa4bdc6021d85d329da5f2
   script:
     - make doc
   artifacts:
    paths:
      - doc/_build/html/
+     - doc/_build/latex/
   tags:
     - docker
   when: manual