diff --git a/src/index.ts b/src/index.ts
index 1e20c23..a7cb9a5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -74,7 +74,7 @@ const createLinkElement = (props: RehypeScrollToLink & { destinationId: string }
   };
 };
 
-const rehypeScrollToTop: Plugin<[Partial<RehypeScrollToTopOptions>], Root> = (options = {}) => {
+const rehypeScrollToTop: Plugin<[Partial<RehypeScrollToTopOptions>?], Root> = (options = {}) => {
   const opts = mergeOptions(options);
 
   return (tree) => {