diff --git a/pyproject.toml b/pyproject.toml
index 330f6150d0..289a6c6415 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "IfcOpenShell"
 version = "0.0.0"
 dependencies = [
     "black==26.3.1",
-    "ruff==0.15.8",
+    "ruff==0.15.9",
     "poethepoet",
     "gersemi==0.26.1",
 ]