diff --git a/packages/engine.io/lib/server.ts b/packages/engine.io/lib/server.ts
index 7a89c4a..208b2f8 100644
--- a/packages/engine.io/lib/server.ts
+++ b/packages/engine.io/lib/server.ts
@@ -73,7 +73,11 @@ interface ConnectionError {
 }
 
 interface ServerReservedEvents {
-  connection: (socket: Socket, request: Request, connInfo: Deno.ServeHandlerInfo) => void;
+  connection: (
+    socket: Socket,
+    request: Request,
+    connInfo: Deno.ServeHandlerInfo,
+  ) => void;
   connection_error: (err: ConnectionError) => void;
 }
 
@@ -125,7 +129,10 @@ export class Server extends EventEmitter<
    * @param additionalHandler - another handler which will receive the request if the path does not match
    */
   public handler(additionalHandler?: Deno.ServeHandler) {
-    return (req: Request, connInfo: Deno.ServeHandlerInfo): Response | Promise<Response> => {
+    return (
+      req: Request,
+      connInfo: Deno.ServeHandlerInfo,
+    ): Response | Promise<Response> => {
       const url = new URL(req.url);
       if (url.pathname === this.opts.path) {
         return this.handleRequest(req, connInfo, url);