diff --git a/pyproject.toml b/pyproject.toml
index 4c76e1b9..1aa439d3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ kai = "kai.main:main"
 
 [project.optional-dependencies]
 dev = [
-    "ruff>=0.9.0",
+    "ruff>=0.15.20",
     "pytest>=8.0",
     "pytest-asyncio>=0.24.0",
 ]