diff --git a/src/pjson.ts b/src/pjson.ts
index aaa3cd03..c28eb4d7 100644
--- a/src/pjson.ts
+++ b/src/pjson.ts
@@ -80,6 +80,7 @@ export namespace PJSON {
     export interface User {
       type: 'user',
       name: string,
+      url?: string,
       tag?: string,
     }
     export interface Link {