diff --git a/homeassistant/bootstrap.py b/homeassistant/bootstrap.py
index c246b822dc3..3c1d722768b 100644
--- a/homeassistant/bootstrap.py
+++ b/homeassistant/bootstrap.py
@@ -11,6 +11,8 @@ start by calling homeassistant.start_home_assistant(bus)
 
 import os
 import configparser
+import yaml
+import io
 import logging
 from collections import defaultdict