diff --git a/environment.yml b/environment.yml
index 988584c..4635850 100644
--- a/environment.yml
+++ b/environment.yml
@@ -289,7 +289,7 @@ dependencies:
 - xwrf
 - ecmwf-api-client
 - pygamma_n
-- mopper>=1.1.1  # pin to update
+- mopper>=1.2.0  # pin to update
 - scores
 - pip:
   - railroad-diagrams ### Unlisted dependency of pip and pyparsing