diff --git a/backend/alembic/env.py b/backend/alembic/env.py
index 511ed97f..4ef4e37d 100644
--- a/backend/alembic/env.py
+++ b/backend/alembic/env.py
@@ -1,41 +1,31 @@
-from logging.config import fileConfig
+import logging
 
-import sqlmodel
 from alembic import context
 from oasst_backend import models  # noqa: F401
 from sqlalchemy import engine_from_config, pool
 
-# this is the Alembic Config object, which provides
-# access to the values within the .ini file in use.
+# Read in the Alembic config file.
 config = context.config
 
-# Interpret the config file for Python logging.
-# This line sets up loggers basically.
+# Set up loggers.
 if config.config_file_name is not None:
-    fileConfig(config.config_file_name)
+    logging.config.fileConfig(config.config_file_name)
 
-# add your model's MetaData object here
-# for 'autogenerate' support
-# from myapp import mymodel
-# target_metadata = mymodel.Base.metadata
-target_metadata = sqlmodel.SQLModel.metadata
+# Add the model's MetaData object here for 'autogenerate' support.
+target_metadata = models.Base.metadata
 
-# other values from the config, defined by the needs of env.py,
-# can be acquired:
+# Other values from the config file can be acquired as follows:
 # my_important_option = config.get_main_option("my_important_option")
 # ... etc.
 
 
-def run_migrations_offline() -> None:
-    """Run migrations in 'offline' mode.
+def run_migrations_offline():
+    """
+    Run migrations in 'offline' mode.
 
-    This configures the context with just a URL
-    and not an Engine, though an Engine is acceptable
-    here as well.  By skipping the Engine creation
-    we don't even need a DBAPI to be available.
-
-    Calls to context.execute() here emit the given string to the
-    script output.
+    This configures the context with just a URL and not an Engine,
+    though an Engine is acceptable here as well. By skipping the
+    Engine creation we don't even need a DBAPI to be available.
 
     """
     url = config.get_main_option("sqlalchemy.url")
@@ -45,16 +35,16 @@ def run_migrations_offline() -> None:
         literal_binds=True,
         dialect_opts={"paramstyle": "named"},
     )
-
     with context.begin_transaction():
         context.run_migrations()
 
 
-def run_migrations_online() -> None:
-    """Run migrations in 'online' mode.
+def run_migrations_online():
+    """
+    Run migrations in 'online' mode.
 
-    In this scenario we need to create an Engine
-    and associate a connection with the context.
+    In this scenario we need to create an Engine and associate a
+    connection with the context.
 
     """
     connectable = engine_from_config(
@@ -62,10 +52,8 @@ def run_migrations_online() -> None:
         prefix="sqlalchemy.",
         poolclass=pool.NullPool,
     )
-
     with connectable.connect() as connection:
         context.configure(connection=connection, target_metadata=target_metadata)
-
         with context.begin_transaction():
             context.get_context()._ensure_version_table()
             connection.execute("LOCK TABLE alembic_version IN ACCESS EXCLUSIVE MODE")