diff --git a/models/db_mig.py b/models/db_mig.py
index 46e278b..e786056 100644
--- a/models/db_mig.py
+++ b/models/db_mig.py
@@ -7,52 +7,51 @@
 from sqlmodel import SQLModel
 
 
-async def add_column_if_not_exists(engine, table_name: str, column: Column) -> None:
+async def add_column_if_not_exists(
+    conn, dialect, table_name: str, column: Column
+) -> None:
     """Add a column to a table if it doesn't exist.
 
     Args:
-        engine: SQLAlchemy engine
+        conn: SQLAlchemy conn
         table_name: Name of the table
         column: Column to add
     """
-    async with engine.connect() as conn:
-        # Use run_sync to perform inspection on the connection
-        def _get_columns(connection):
-            inspector = inspect(connection)
-            return [c["name"] for c in inspector.get_columns(table_name)]
-
-        columns = await conn.run_sync(_get_columns)
-
-        if column.name not in columns:
-            async with conn.begin():
-                # Build column definition
-                column_def = f"{column.name} {column.type.compile(engine.dialect)}"
-
-                # Add DEFAULT if specified
-                if column.default is not None:
-                    if hasattr(column.default, "arg"):
-                        default_value = column.default.arg
-                        if not isinstance(default_value, Callable):
-                            if isinstance(default_value, bool):
-                                default_value = str(default_value).lower()
-                            elif isinstance(default_value, str):
-                                default_value = f"'{default_value}'"
-                            elif isinstance(default_value, (list, dict)):
-                                default_value = "'{}'"
-                            column_def += f" DEFAULT {default_value}"
-
-                # Execute ALTER TABLE
-                await conn.execute(
-                    text(f"ALTER TABLE {table_name} ADD COLUMN {column_def}")
-                )
-                logging.info(f"Added column {column.name} to table {table_name}")
-
-
-async def update_table_schema(engine, model: Type[SQLModel]) -> None:
+
+    # Use run_sync to perform inspection on the connection
+    def _get_columns(connection):
+        inspector = inspect(connection)
+        return [c["name"] for c in inspector.get_columns(table_name)]
+
+    columns = await conn.run_sync(_get_columns)
+
+    if column.name not in columns:
+        # Build column definition
+        column_def = f"{column.name} {column.type.compile(dialect)}"
+
+        # Add DEFAULT if specified
+        if column.default is not None:
+            if hasattr(column.default, "arg"):
+                default_value = column.default.arg
+                if not isinstance(default_value, Callable):
+                    if isinstance(default_value, bool):
+                        default_value = str(default_value).lower()
+                    elif isinstance(default_value, str):
+                        default_value = f"'{default_value}'"
+                    elif isinstance(default_value, (list, dict)):
+                        default_value = "'{}'"
+                    column_def += f" DEFAULT {default_value}"
+
+        # Execute ALTER TABLE
+        await conn.execute(text(f"ALTER TABLE {table_name} ADD COLUMN {column_def}"))
+        logging.info(f"Added column {column.name} to table {table_name}")
+
+
+async def update_table_schema(conn, dialect, model: Type[SQLModel]) -> None:
     """Update table schema by adding missing columns from the model.
 
     Args:
-        engine: SQLAlchemy engine
+        conn: SQLAlchemy conn
         model: SQLModel class to check for new columns
     """
     if not hasattr(model, "__table__"):
@@ -61,7 +60,7 @@ async def update_table_schema(engine, model: Type[SQLModel]) -> None:
     table_name = model.__tablename__
     for name, column in model.__table__.columns.items():
         if name != "id":  # Skip primary key
-            await add_column_if_not_exists(engine, table_name, column)
+            await add_column_if_not_exists(conn, dialect, table_name, column)
 
 
 async def safe_migrate(engine) -> None:
@@ -75,17 +74,16 @@ async def safe_migrate(engine) -> None:
         async with engine.begin() as conn:
             await conn.run_sync(SQLModel.metadata.create_all)
 
-        # Get existing table metadata
-        metadata = MetaData()
-        async with engine.begin() as conn:
+            # Get existing table metadata
+            metadata = MetaData()
             await conn.run_sync(metadata.reflect)
 
-        # Update schema for all SQLModel classes
-        for model in SQLModel.__subclasses__():
-            if hasattr(model, "__tablename__"):
-                table_name = model.__tablename__
-                if table_name in metadata.tables:
-                    await update_table_schema(engine, model)
+            # Update schema for all SQLModel classes
+            for model in SQLModel.__subclasses__():
+                if hasattr(model, "__tablename__"):
+                    table_name = model.__tablename__
+                    if table_name in metadata.tables:
+                        await update_table_schema(conn, engine.dialect, model)
 
         logging.info("Database schema updated successfully")
     except Exception as e: