diff --git a/lib/@types/index.d.ts b/lib/@types/index.d.ts
index d520edd..1f2fd66 100644
--- a/lib/@types/index.d.ts
+++ b/lib/@types/index.d.ts
@@ -139,6 +139,7 @@ declare module 'drachtio-srf' {
     invite(callback: (req: SrfRequest, res: SrfResponse) => void): void;
     register(callback: (req: SrfRequest, res: SrfResponse) => void): void;
     options(callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    subscribe(callback: (req: SrfRequest, res: SrfResponse) => void): void;
     request(uri: string, opts, method, [body], callback?: (err, requestSent: SrfRequest) => void);
     request(opts, callback?: (err, requestSent: SrfRequest) => void);
     proxyRequest(req: SrfRequest, destination: string | string[], [opts], callback?: (err, results) => {}): void;