diff --git a/lib/types/index.ts b/lib/types/index.ts
index e038aa326a..123d9df16e 100644
--- a/lib/types/index.ts
+++ b/lib/types/index.ts
@@ -236,5 +236,5 @@ export interface RegExpLike {
 export interface UriResolver {
   parse(uri: string): URI.URIComponents
   resolve(base: string, path: string): string
-  serialize(): string
+  serialize(component: URI.URIComponents): string
 }