diff --git a/requirements-dev.txt b/requirements-dev.txt
index 5adca7c..58fa1f1 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,4 +4,4 @@ coverage==5.5
 pylint==2.7.3
 pytest-cov==2.11.1
 pre-commit==2.11.1
-black==20.8b1
+black==21.5b2