diff --git a/pyproject.toml b/pyproject.toml
index e209bdf..d92c9c2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ dev = [
   "build>=1.2.2,<1.4.0",
   "ruff>=0.12.2,<0.15.0",
   "sphinx>=7.3.7,<8.2.0",
-  "scikit-learn>=1.5,<1.8",
+  "scikit-learn>=1.5,<1.9",
   "pre-commit>=4.0.1,<4.6.0"
 ]
 
@@ -46,7 +46,7 @@ dev-dependencies = [
   "build>=1.2.2,<1.4.0",
   "ruff>=0.12.2,<0.15.0",
   "sphinx>=7.3.7,<8.2.0",
-  "scikit-learn>=1.5,<1.8",
+  "scikit-learn>=1.5,<1.9",
   "pre-commit>=4.0.1,<4.6.0"
 ]