diff --git a/requirements.txt b/requirements.txt
index 8d95759b2..0d2652698 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # This file is automatically generated by scripts/dev/recompile_requirements.py
 
-attrs==17.3.0
+attrs==17.4.0
 colorama==0.3.9
 cssutils==1.0.2
 Jinja2==2.10