diff --git a/dev-requirements.txt b/dev-requirements.txt
index 74a46b3f..5766f276 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -4,7 +4,7 @@ codecov
 chardet==4.0.*
 Flask>=2.0,<3.0; python_version >= '3.6'
 requests>=2.26,<3.0; python_version >= '3.6'
-black==21.9b0; python_version >= '3.6'
+black==21.10b0; python_version >= '3.6'
 flake8==4.0.1; python_version >= '3.6'
 mypy==0.910; python_version >= '3.6'
 isort; python_version >= '3.6'