diff --git a/lib/api.js b/lib/api.js
index 2ca44f0..99660fc 100644
--- a/lib/api.js
+++ b/lib/api.js
@@ -88,7 +88,7 @@ class Zabbix {
   async login () {
     try {
       const result = await this.request('user.login', {
-        user: this.user,
+        username: this.user,
         password: this.password
       })
       this.auth = result