diff --git a/tox.ini b/tox.ini
index 742c270..ba97d7c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,7 +33,7 @@ deps =
 basepython = python3.6
 deps =
     flake8==3.9.2
-    black==21.5b1
+    black==21.8b0
     isort==5.9.3
 commands =
     flake8 django_migration_linter/