diff --git a/validation/users.json b/validation/users.json
index 9a7a19d..7cb76af 100644
--- a/validation/users.json
+++ b/validation/users.json
@@ -3,6 +3,7 @@
         "required": [
             "user",
             "link",
+            "label",
             "tg_name",
             "tg_phone",
             "tg_locale",
@@ -14,23 +15,27 @@
                 "description": "Telegram ID of user"
             },
             "link": {
-                "bsonType": "string",
+                "bsonType": ["string", "null"],
                 "description": "Invite link to destination group"
             },
+            "label": {
+                "bsonType": "string",
+                "description": "Label given by admins"
+            },
             "tg_name": {
                 "bsonType": "string",
                 "description": "Telegram first name"
             },
             "tg_phone": {
-                "bsonType": "string",
+                "bsonType": ["string", "null"],
                 "description": "Telegram phone number"
             },
             "tg_locale": {
-                "bsonType": "string",
+                "bsonType": ["string", "null"],
                 "description": "Telegram locale"
             },
             "tg_username": {
-                "bsonType": "string",
+                "bsonType": ["string", "null"],
                 "description": "Telegram username"
             }
         }