diff --git a/requirements_dev.txt b/requirements_dev.txt
index 35e787d..d1e82e4 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,6 +1,6 @@
 argparse==1.4.0
 bumpversion==0.5.3
-black==19.10b0
+black==21.11b1
 coverage==5.0.3
 cryptography==2.8
 flask==1.1.1