diff --git a/pyproject.toml b/pyproject.toml
index 9cd6521df..65b945518 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,8 +38,8 @@ classifiers = [
     "Topic :: Scientific/Engineering",
 ]
 dependencies = [
-    "scikit-learn >= 1.6.0",
-    "scipy >= 1.15.0",  # explicit to adhere to scikit-learn dependencies
+    "scikit-learn >= 1.6, < 1.7",
+    "scipy >= 1.15",  # explicit to adhere to scikit-learn dependencies
 ]
 dynamic = ["version"]