diff --git a/parsers/vmess.py b/parsers/vmess.py
index 8181d2c69..a6bea1af4 100644
--- a/parsers/vmess.py
+++ b/parsers/vmess.py
@@ -70,7 +70,7 @@ def parse(data):
         'server': item.get('add'),
         'server_port': int(item.get('port')),
         'uuid': item.get('id'),
-        'security': item.get('scy') if item.get('scy') != 'http' else 'auto',
+        'security': item.get('scy') if item.get('scy') not in ['http', None] else 'auto',
         'alter_id': int(item.get('aid','0')),
         'packet_encoding': 'xudp'
     }
@@ -139,4 +139,4 @@ def parse(data):
             node['multiplex']['min_streams'] = int(item['min_streams'])
         if item.get('padding') == True:
             node['multiplex']['padding'] = True
-    return node
\ No newline at end of file
+    return node