diff --git a/setup.py b/setup.py
index d95530c..08335a5 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@ import flake8
 tests_require = ['mock', 'pytest']
 
 requires = [
-    "pyflakes >= 0.8.1, != 1.2.0, != 1.2.1, != 1.2.2, < 1.3.0",
+    "pyflakes >= 0.8.1, != 1.2.0, != 1.2.1, != 1.2.2, < 1.4.0",
     "pycodestyle >= 2.0.0, < 2.1.0",
     "mccabe >= 0.5.0, < 0.6.0",
 ]