diff --git a/tox.ini b/tox.ini
index 96caf6b..6caebfc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,8 +24,7 @@ skip_missing_interpreters = True
 
 [testenv]
 deps =
-    git+https://github.com/twisted/twisted#egg=twisted
-    #twisted
+    twisted >= 16.1.0
     pyflakes
     {env:EXTRA_DEPENDENCY:}
 commands =