diff --git a/environment.yml b/environment.yml
index 31ac489077a04d7aac9846cd9d65d8d800e16564..19cd07f68c58067bbf21078f496e46603ea79d3e 100644
--- a/environment.yml
+++ b/environment.yml
@@ -2,5 +2,4 @@ name: mat
 channels:
   - conda-forge
 dependencies:
-  - matlab_kernel tornado==4.5.3
   - python=3.5