diff --git a/backend/alembic/versions/initial_migration.py b/backend/alembic/versions/initial_migration.py
index 5d28df5..e8ca6b5 100644
--- a/backend/alembic/versions/initial_migration.py
+++ b/backend/alembic/versions/initial_migration.py
@@ -14,22 +14,9 @@ branch_labels = None
 depends_on = None
 
 def upgrade() -> None:
-    connection = op.get_bind()
-    
-    # Проверяем существование enum типов перед их созданием
-    result = connection.execute(sa.text(
-        "SELECT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'requeststatus');"
-    )).scalar()
-    if not result:
-        request_status = sa.Enum(RequestStatus, name='requeststatus')
-        request_status.create(connection, checkfirst=True)
-
-    result = connection.execute(sa.text(
-        "SELECT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'requestpriority');"
-    )).scalar()
-    if not result:
-        request_priority = sa.Enum(RequestPriority, name='requestpriority')
-        request_priority.create(connection, checkfirst=True)
+    # Create enum types
+    request_status = sa.Enum(RequestStatus, name='requeststatus')
+    request_priority = sa.Enum(RequestPriority, name='requestpriority')
 
     # Create employees table
     op.create_table(
@@ -53,8 +40,8 @@ def upgrade() -> None:
         sa.Column('employee_id', sa.Integer(), nullable=True),
         sa.Column('department', sa.String(), nullable=False),
         sa.Column('request_type', sa.String(), nullable=False),
-        sa.Column('priority', 'requestpriority', nullable=False),
-        sa.Column('status', 'requeststatus', nullable=False, server_default="'NEW'"),
+        sa.Column('priority', request_priority, nullable=False),
+        sa.Column('status', request_status, nullable=False, server_default=RequestStatus.NEW.name),
         sa.Column('description', sa.String(), nullable=True),
         sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('now()')),
         sa.ForeignKeyConstraint(['employee_id'], ['employees.id'], ),
@@ -66,7 +53,6 @@ def downgrade() -> None:
     op.drop_table('requests')
     op.drop_table('employees')
     
-    # Drop enum types if they exist
-    connection = op.get_bind()
-    connection.execute(sa.text('DROP TYPE IF EXISTS requeststatus CASCADE;'))
-    connection.execute(sa.text('DROP TYPE IF EXISTS requestpriority CASCADE;'))
\ No newline at end of file
+    # Drop enum types
+    sa.Enum(RequestStatus, name='requeststatus').drop(op.get_bind(), checkfirst=True)
+    sa.Enum(RequestPriority, name='requestpriority').drop(op.get_bind(), checkfirst=True)
\ No newline at end of file