diff --git a/requirements_lint.txt b/requirements_lint.txt
index 2c1fe94..9721fae 100644
--- a/requirements_lint.txt
+++ b/requirements_lint.txt
@@ -1,5 +1,5 @@
 -r requirements.txt
-black==21.7b0
+black==21.12b0
 flake8==3.9.2
 mypy==0.910
 pydocstyle==6.1.1