diff --git a/doc/environment.yml b/doc/environment.yml
index 228c224..720478b 100644
--- a/doc/environment.yml
+++ b/doc/environment.yml
@@ -6,6 +6,7 @@ channels:
 dependencies:
   - python
   - sphinx_rtd_theme
+  - myst-parser
   - openalea.phenomenal
   - ipykernel
   - ipyvolume