diff --git a/tox.ini b/tox.ini
index 7a3689139..17addccd5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -167,7 +167,7 @@ deps =
     pep8==1.7.0
     pep8-naming==0.3.3
     pydocstyle==1.0.0
-    pyflakes==1.2.2
+    pyflakes==1.2.3
     pyparsing==2.1.3
     six==1.10.0
     sortedcontainers==1.4.4