diff --git a/package-lock.json b/package-lock.json
index 8982c10..4c0cf54 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "react-hooks-use-modal",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 13cfacf..247d9ef 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react-hooks-use-modal",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "author": "shibe97",
   "description": "A react hook which can open the modal with react-portal",
   "repository": {
diff --git a/src/index.tsx b/src/index.tsx
index 834763a..e158b80 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -13,7 +13,7 @@ export interface ModalOptions {
   preventScroll?: boolean;
 };
 
-export type UseModal = (elementId: string, options: ModalOptions) => [
+export type UseModal = (elementId: string, options?: ModalOptions) => [
   ModalWrapper: React.FC<{children: React.ReactNode}>,
   open: () => void,
   close: () => void,