diff --git a/openapi/__init__.py b/openapi/__init__.py
index 0e40a57..0f4c485 100644
--- a/openapi/__init__.py
+++ b/openapi/__init__.py
@@ -1,4 +1,4 @@
 """Minimal OpenAPI asynchronous server application
 """
 
-__version__ = '0.5.1'
+__version__ = '0.5.2'
diff --git a/openapi/db/commands.py b/openapi/db/commands.py
index c8d6a7e..4c2f158 100644
--- a/openapi/db/commands.py
+++ b/openapi/db/commands.py
@@ -69,10 +69,9 @@ def upgrade(ctx, revision, drop_tables):
     """
     if drop_tables:
         app = ctx.obj['app']
-        metadata = app['metadata']
         engine = app['store']
-        metadata.reflect(engine)
-        metadata.drop_all(engine)
+        engine.execute("DROP SCHEMA IF EXISTS public CASCADE")
+        engine.execute("CREATE SCHEMA IF NOT EXISTS public")
         click.echo("tables dropped")
     migration(ctx).upgrade(revision)
     click.echo("upgraded sucessfuly")