diff --git a/pyproject.toml b/pyproject.toml
index e28d047e..15a500e5 100755
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
     "scipy>=1.4.1",
     "matplotlib",
     "pandas>=0.24.1",
-    "scikit-learn>=0.22.0",
+    "scikit-learn>=0.22.0, <1.6",
     "statsmodels>=0.9.0",
     "Cython<=0.29.34",
     "seaborn",