diff --git a/environment.yml b/environment.yml
index 924935d..5b973f5 100644
--- a/environment.yml
+++ b/environment.yml
@@ -10,5 +10,5 @@ dependencies:
   - python
   - radiomics::pyradiomics
   - simpleitk
-  - scikit-learn
+  - scikit-learn<1.6
   - xgboost
diff --git a/requirements.txt b/requirements.txt
index 4917972..ad03487 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,5 +4,5 @@ pandas
 pooch
 pyradiomics
 simpleitk
-scikit-learn
+scikit-learn<1.6
 xgboost