diff --git a/src/internet.ts b/src/internet.ts
index 7937e3d0060..6384b155ac6 100644
--- a/src/internet.ts
+++ b/src/internet.ts
@@ -220,7 +220,7 @@ export class Internet {
    * @param firstName
    * @param lastName
    */
-  exampleEmail(firstName, lastName) {
+  exampleEmail(firstName?: string, lastName?: string) {
     const provider = this.faker.random.arrayElement(
       this.faker.definitions.internet.example_email
     );