diff --git a/index.d.ts b/index.d.ts
index 9331ccb..35f25e0 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -8,6 +8,7 @@ import {LEVEL, MESSAGE, SPLAT} from 'triple-beam'
 export interface TransformableInfo {
   level: string;
   message: any;
+  timestamp: any;
   [LEVEL]?: string;
   [MESSAGE]?: any;
   [SPLAT]?: any;