diff --git a/pkgs/development/python-modules/appthreat-vulnerability-db/default.nix b/pkgs/development/python-modules/appthreat-vulnerability-db/default.nix
index 70c9ec3e08c7..463518ef2f98 100644
--- a/pkgs/development/python-modules/appthreat-vulnerability-db/default.nix
+++ b/pkgs/development/python-modules/appthreat-vulnerability-db/default.nix
@@ -18,7 +18,7 @@
 buildPythonPackage rec {
   pname = "appthreat-vulnerability-db";
   version = "5.5.3";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";