diff --git a/doc/rtd_environment.yml b/doc/rtd_environment.yml
index 514c53210..e6848fab4 100644
--- a/doc/rtd_environment.yml
+++ b/doc/rtd_environment.yml
@@ -18,7 +18,7 @@ dependencies:
   - ipywidgets
   # documentation
   - sphinx>=4.1.1
-  - jinja2
+  - jinja2=3.0
   - sphinxcontrib-napoleon
   - nbsphinx
   - sphinx-copybutton