diff --git a/migrations/env.py b/migrations/env.py
index 6a10e6d..4742e14 100755
--- a/migrations/env.py
+++ b/migrations/env.py
@@ -19,7 +19,7 @@ logger = logging.getLogger('alembic.env')
 # target_metadata = mymodel.Base.metadata
 from flask import current_app
 config.set_main_option('sqlalchemy.url',
-                       current_app.config.get('SQLALCHEMY_DATABASE_URI'))
+                       current_app.config.get('SQLALCHEMY_DATABASE_URI').replace("%","%%"))
 target_metadata = current_app.extensions['migrate'].db.metadata
 
 # other values from the config, defined by the needs of env.py,