diff --git a/questions.py b/questions.py
index 4bf44a2..4f17fa1 100644
--- a/questions.py
+++ b/questions.py
@@ -148,7 +148,7 @@ class QuestionCheckbox(Question):
         # set defaults if missing
         self.set_defaults({
             'text': '',
-            'correct': [0.0] * n,     # useful for questionaries
+            'correct': [1.0] * n,     # useful for questionaries
             'shuffle': True,
             'discount': True,
             'choose': n,              # number of options
diff --git a/serve.py b/serve.py
index 76436ea..26fd166 100755
--- a/serve.py
+++ b/serve.py
@@ -16,7 +16,7 @@ import functools
 import tornado.ioloop
 import tornado.web
 import tornado.httpserver
-from tornado import template, iostream
+from tornado import iostream
 
 # this project
 from learnapp import LearnApp
@@ -303,8 +303,8 @@ class QuestionHandler(BaseHandler):
 
 # -------------------------------------------------------------------------
 def signal_handler(signal, frame):
-    r = input(' --> Stop webserver? (yes/no) ')
-    if r in ('yes', 'YES'):
+    r = input(' --> Stop webserver? (yes/no) ').lower()
+    if r == 'yes':
         tornado.ioloop.IOLoop.current().stop()
         logging.critical('Webserver stopped.')
         sys.exit(0)
--
libgit2 0.21.2