diff --git a/requirements-dev.txt b/requirements-dev.txt
index 681225f..eb6eb38 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,3 @@
-black==19.10b0
+black==21.5b2
 pytest==5.4.2
 pre-commit==2.3.0