diff --git a/src/server/middleware/prometheus/types.ts b/src/server/middleware/prometheus/types.ts
index 2cf4f91..27a6bec 100644
--- a/src/server/middleware/prometheus/types.ts
+++ b/src/server/middleware/prometheus/types.ts
@@ -1,12 +1,6 @@
-import { Request, RequestHandler, Response } from 'express';
+import { Request, Response } from 'express';
 import Prometheus from 'prom-client';
 
-export class HttpMetricsCollector {
-  constructor(options?: CollectorOpts);
-  static init(options?: CollectorOpts): void;
-  static collect(res: Response | any): void;
-}
-
 export interface ApiMetricsOpts {
   metricsPath?: string;
   defaultMetricsInterval?: number;