diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 788c99e5..1eee82f4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ image: continuumio/miniconda3:latest
 
 before_script:
 - conda install -y pyzmq
-- pip install jupyter-book sphinxcontrib-bibtex
+- pip install jupyter-book==0.10.1 sphinxcontrib-bibtex
 
 pages:
   stage: deploy