diff --git a/api/models/user.py b/api/models/user.py
index e38812418..1ede1fa5c 100644
--- a/api/models/user.py
+++ b/api/models/user.py
@@ -10,7 +10,7 @@ class User(Base):
 
     id = Column(Integer, primary_key=True, autoincrement=True, nullable=False)
     password = Column(String(length=256), nullable=True)
-    login = Column(String(length=20), nullable=False, unique=True)
+    login = Column(String(length=100), nullable=False, unique=True)
 
 
 class UserGroup(Base):