diff --git a/dev_requirements.txt b/dev_requirements.txt
index 30b6c0f..9368501 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -1,3 +1,3 @@
 coverage
-pyflakes==1.6.0
+pyflakes==2.1.1
 yapf==0.21.0