diff --git a/packages/effect-fc/src/Memoized.ts b/packages/effect-fc/src/Memoized.ts
index 6358351..f12ccbf 100644
--- a/packages/effect-fc/src/Memoized.ts
+++ b/packages/effect-fc/src/Memoized.ts
@@ -25,22 +25,22 @@ export const isMemoized = (u: unknown): u is Memoized<unknown> => Predicate.hasP
 
 export const memo = <T extends Component.Component<any, any, any>>(
     self: T
-): T & Memoized<Component.Component.Props<T>> => Object.setPrototypeOf(
-    Object.assign(function() {}, self, MemoizedProto),
-    Object.getPrototypeOf(self),
+): T & Memoized<Component.FunctionComponent.Props<Component.Component.FunctionComponent<T>>> => Object.setPrototypeOf(
+    Object.assign(function() {}, self),
+    Object.seal({ ...Object.getPrototypeOf(self), ...MemoizedProto }),
 )
 
 export const withOptions: {
     <T extends Component.Component<any, any, any> & Memoized<any>>(
-        options: Partial<Memoized.Options<Component.Component.Props<T>>>
+        options: Partial<Memoized.Options<Component.FunctionComponent.Props<Component.Component.FunctionComponent<T>>>>
     ): (self: T) => T
     <T extends Component.Component<any, any, any> & Memoized<any>>(
         self: T,
-        options: Partial<Memoized.Options<Component.Component.Props<T>>>,
+        options: Partial<Memoized.Options<Component.FunctionComponent.Props<Component.Component.FunctionComponent<T>>>>,
     ): T
 } = Function.dual(2, <T extends Component.Component<any, any, any> & Memoized<any>>(
     self: T,
-    options: Partial<Memoized.Options<Component.Component.Props<T>>>,
+    options: Partial<Memoized.Options<Component.FunctionComponent.Props<Component.Component.FunctionComponent<T>>>>,
 ): T => Object.setPrototypeOf(
     Object.assign(function() {}, self, options),
     Object.getPrototypeOf(self),