diff --git a/main.py b/main.py
index 5eb3dec..2cf6497 100644
--- a/main.py
+++ b/main.py
@@ -18,7 +18,7 @@ from tornado.util import errno_from_exception
 
 try:
     from concurrent.futures import Future
-except:
+except ImportError:
     from tornado.concurrent import Future