diff --git a/pkgs/development/python-modules/black/default.nix b/pkgs/development/python-modules/black/default.nix
index ea4fb0b4a74d..3fe77cb297b4 100644
--- a/pkgs/development/python-modules/black/default.nix
+++ b/pkgs/development/python-modules/black/default.nix
@@ -20,13 +20,13 @@
 
 buildPythonPackage rec {
   pname = "black";
-  version = "21.10b0";
+  version = "21.12b0";
 
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-qZUiKQkuMl/l89rlbYH2ObI/cTHrhAeBlH5LKIYDDzM=";
+    sha256 = "sha256-d7gPaTpWni5SeVhFljTxjfmwuiYluk4MLV2lvkLm8rM=";
   };
 
   nativeBuildInputs = [ setuptools-scm ];