diff --git a/requirements.txt b/requirements.txt
index f5db3b8..94c8730 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 # lint
-black==22.6.0
+black==22.12.0
 
 # atcoder
 online-judge-tools==11.5.1