diff --git a/tox.ini b/tox.ini
index 42101832e..8096a870b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -110,7 +110,7 @@ deps =
     -r{toxinidir}/requirements.txt
     py==1.4.30
     pytest==2.7.3  # rq.filter: <2.8.0
-    pyflakes==0.9.2
+    pyflakes==1.0.0
     pytest-flakes==1.0.1
 commands =
     {envpython} scripts/link_pyqt.py --tox {envdir}