diff --git a/tox.ini b/tox.ini
index 90f81ca..7ee4127 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,7 +18,7 @@ skip_missing_interpreters = True
 
 [testenv]
 deps =
-    pyflakes != 1.2.0, != 1.2.1, != 1.2.2
+    pyflakes >= 1.2.3
     {env:EXTRA_DEPENDENCY:}
 commands =
     pyflakes setup.py src