diff --git a/requirements-dev.txt b/requirements-dev.txt
index 97e870f72..899ba3f7e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 -r requirements.txt
-black==21.11b1
+black==21.12b0
 eth-tester[py-evm]==0.5.0b4
 coverage
 pytest