diff --git a/environment.yml b/environment.yml
index 5b039e7f7..afe7a7ed7 100644
--- a/environment.yml
+++ b/environment.yml
@@ -54,7 +54,7 @@ dependencies:
     # 3/4 req hyperopt
 
     - scipy
-    - scikit-learn
+    - scikit-learn<1.2.0
     - filelock
     - scikit-optimize
     - progressbar2