diff --git a/requirements.txt b/requirements.txt
index 90870656..f3dc61e7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ binaryornot==0.4.4
 
 # Code quality
 # ------------------------------------------------------------------------------
-flake8==3.6.0
+flake8==3.7.3
 
 # Testing
 # ------------------------------------------------------------------------------