diff --git a/requirements.txt b/requirements.txt
index f266615..b94d70b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 apipkg==1.5
 atomicwrites==1.3.0
-attrs==18.2.0
+attrs==21.2.0
 bleach==3.1.4
 certifi==2019.6.16
 cffi==1.12.3