diff --git a/app/models/user.py b/app/models/user.py
index 6625e9e..14f33a5 100644
--- a/app/models/user.py
+++ b/app/models/user.py
@@ -5,7 +5,7 @@ from app.extensions import db
 class User(db.Model):
   id = mapped_column(db.Integer, primary_key=True, autoincrement=True)
   username = mapped_column(db.String(255), nullable=False)
-  email = mapped_column(db.String(255), nullable=False)
+  email = mapped_column(db.String(255), nullable=False, unique=True)
   password = mapped_column(db.String(255), nullable=False)
   name = mapped_column(db.String(255), nullable=False)
   lastname = mapped_column(db.String(255), nullable=False)