diff --git a/kallithea/alembic/env.py b/kallithea/alembic/env.py
--- a/kallithea/alembic/env.py
+++ b/kallithea/alembic/env.py
@@ -15,6 +15,7 @@
 # Alembic migration environment (configuration).
 
 import logging
+import os
 from logging.config import fileConfig
 
 from alembic import context