diff --git a/requirements-dev.txt b/requirements-dev.txt
index 80e1b41..7cb1bce 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 isort==5.8.0
-black==21.5b0
+black==21.5b1
 sphinx==4.0.1
 pytest==6.2.4
 pytest-cov==2.11.1