diff --git a/models/user.py b/models/user.py
index 1644e85..a684a6e 100644
--- a/models/user.py
+++ b/models/user.py
@@ -13,13 +13,13 @@ class User(Base):
     email = Column(String, unique=True, nullable=False, index=True)
     password = Column(String, nullable=False)
     role = Column(String, nullable=False, default="student")
-    grade_level = Column(Integer)
-    student_id = Column(String, unique=True, index=True)
-    phone_number = Column(String)
-    address = Column(String)
-    date_of_birth = Column(DateTime)
+    grade_level = Column(Integer, nullable=True)
+    student_id = Column(String, unique=True, nullable=True)
+    phone_number = Column(String, nullable=True)
+    address = Column(String, nullable=True)
+    date_of_birth = Column(DateTime, nullable=True)
     is_active = Column(Boolean, default=True)
-    last_login = Column(DateTime)
-    profile_picture = Column(String)
+    last_login = Column(DateTime, nullable=True)
+    profile_picture = Column(String, nullable=True)
     created_at = Column(DateTime, default=func.now())
     updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
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