diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index c9f0e81..207ab56 100755
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -1,3 +1,5 @@
+"""GUI for the Sinara 8451 Thermostat"""
+
 import json
 import asyncio
 import logging