--- a/bitten/upgrades.py
+++ b/bitten/upgrades.py
@@ -7,6 +7,9 @@
 # you should have received as part of this distribution. The terms
 # are also available at http://bitten.cmlenz.net/wiki/License.
 
+"""Automated upgrades for the Bitten database tables, and other data stored
+in the Trac environment."""
+
 import os
 import sys