diff --git a/environment.yml b/environment.yml
index 139892cce3..0355486fdd 100644
--- a/environment.yml
+++ b/environment.yml
@@ -18,5 +18,5 @@ dependencies:
   - xarray
   - python-graphviz
   - graphviz
-  - mystmd
+  - mystmd>=1.6.0
   - jupyterlab-myst