diff --git a/types/decorator-factory.d.ts b/types/decorator-factory.d.ts
index 018a9aa..e0cd938 100644
--- a/types/decorator-factory.d.ts
+++ b/types/decorator-factory.d.ts
@@ -1 +1 @@
-type DecoratorFactory<T, U> = (target: T, propertyKey: string, descriptor: PropertyDescriptor) => void;
+type DecoratorFactory<T> = (target: T, propertyKey: string, descriptor: PropertyDescriptor) => void;