diff --git a/src/DenoHTTPWorker.ts b/src/DenoHTTPWorker.ts
index ef1b1a7..0b5f791 100644
--- a/src/DenoHTTPWorker.ts
+++ b/src/DenoHTTPWorker.ts
@@ -65,7 +65,7 @@ export interface DenoWorkerOptions {
 
 export const newDenoHTTPWorker = async (
   script: string | URL,
-  options?: Partial<DenoWorkerOptions>
+  options: Partial<DenoWorkerOptions> = {}
 ): Promise<DenoHTTPWorker> => {
   const _options: DenoWorkerOptions = {
     denoExecutable: "deno",