diff --git a/pkgs/development/python-modules/yamale/default.nix b/pkgs/development/python-modules/yamale/default.nix
index f590e8d896c0..05958ab51125 100644
--- a/pkgs/development/python-modules/yamale/default.nix
+++ b/pkgs/development/python-modules/yamale/default.nix
@@ -9,7 +9,8 @@
 
 buildPythonPackage rec {
   pname = "yamale";
-  version = "3.0.8";
+  version = "4.0.2";
+  format = "setuptools";
 
   disabled = pythonOlder "3.6";
 
@@ -17,7 +18,7 @@ buildPythonPackage rec {
     owner = "23andMe";
     repo = pname;
     rev = version;
-    sha256 = "0bn0himn5fwndaxn205s55bdc4np7lhd940i0lkv0m7ybhbw7dap";
+    sha256 = "sha256-hFBU3o3HpL0Schgzcx3oYq0IAUVGKThIfEteYcFbLnk=";
   };
 
   propagatedBuildInputs = [
@@ -29,7 +30,9 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  pythonImportsCheck = [ "yamale" ];
+  pythonImportsCheck = [
+    "yamale"
+  ];
 
   meta = with lib; {
     description = "A schema and validator for YAML";