diff --git a/environment.yml b/environment.yml
index 8ef160b..c4443df 100644
--- a/environment.yml
+++ b/environment.yml
@@ -4,7 +4,7 @@ channels:
   - conda-forge
   - defaults
 dependencies:
-  - mantid=6.9.*
+  - mantid>6.9.20240318
   - matplotlib
   - pre-commit
   - pytest