diff --git a/requirements_test.txt b/requirements_test.txt
index 71abec4..c7afa5d 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,5 +1,5 @@
 pylint==2.10.2
-black==21.7b0
+black==21.8b0
 flake8==3.9.2
 isort==5.9.3
 mypy==0.910