diff --git a/requirements.txt b/requirements.txt
index 63817dad105592de79c258cc4d31c637d855a4cd..6d89451bc3c0f25f428b7e1d93f042fe1448ee09 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-attrs==21.2.0
+attrs==21.4.0
 black==21.9b0
 certifi==2021.10.8
 cffi==1.15.0