diff --git a/backend/alembic/versions/20250313_c7f72154c90b-add_user_authentication.py b/backend/alembic/versions/20250313_c7f72154c90b-add_user_authentication.py
index 7e2c00b..6edc093 100644
--- a/backend/alembic/versions/20250313_c7f72154c90b-add_user_authentication.py
+++ b/backend/alembic/versions/20250313_c7f72154c90b-add_user_authentication.py
@@ -9,6 +9,7 @@ from typing import Sequence, Union
 
 from alembic import op
 import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
 
 
 # revision identifiers, used by Alembic.
@@ -31,16 +32,23 @@ def upgrade() -> None:
     )
     op.create_index(op.f('ix_sessions_refresh_token'), 'sessions', ['refresh_token'], unique=True)
     op.create_index(op.f('ix_sessions_user_id'), 'sessions', ['user_id'], unique=False)
+
     op.add_column('users', sa.Column('email', sa.String(), nullable=True))
     op.add_column('users', sa.Column('password', sa.String(), nullable=True))
-    op.add_column('users', sa.Column('role', sa.Enum('MEMBER', 'ADMINISTRATOR', name='role'), nullable=True))
+
+    role_enum = postgresql.ENUM('MEMBER', 'ADMINISTRATOR', name='role')
+    role_enum.create(op.get_bind(), checkfirst=False)
+    op.add_column('users', sa.Column('role', type_=role_enum, nullable=True))
+
     op.execute('UPDATE users SET email = id || \'@example.com\'')
     op.execute('UPDATE users SET password = \'invalid\'')
     op.execute('UPDATE users SET role = \'MEMBER\'')
+
     with op.batch_alter_table('users', schema=None) as batch_op:
         batch_op.alter_column('email', nullable=False)
         batch_op.alter_column('password', nullable=False)
         batch_op.alter_column('role', nullable=False)
+        
     op.drop_index('ix_users_friendly_name', table_name='users')
     op.create_index(op.f('ix_users_email'), 'users', ['email'], unique=True)
     # ### end Alembic commands ###