diff --git a/environment.yml b/environment.yml
index 69d180b38..6062afe39 100644
--- a/environment.yml
+++ b/environment.yml
@@ -19,7 +19,7 @@ dependencies:
 - sphinxcontrib-bibtex>=2.0.0
 - sphinx-math-dollar
 - pydata-sphinx-theme
-- jupyter-book>=0.11.3
+- jupyter-book<2.0.0
 - jupyter
 - pytest>=6.0
 - pytest-cov