diff --git a/environment.yml b/environment.yml
index 6a1bdf0562..ac48c268de 100644
--- a/environment.yml
+++ b/environment.yml
@@ -51,7 +51,7 @@ dependencies:
   - psyplot >=1.5.0
   - psy-maps >=1.5.0
   - psy-reg >=1.5.0
-  - psy-simple >=1.5.0
+  # - psy-simple >=1.5.0  # nay Py3.13 yet
   - pyproj >=2.1
   # - pys2index  # only from conda-forge  # not py313 compat
   - python >=3.10