diff --git a/pkgs/development/python-modules/charset-normalizer/default.nix b/pkgs/development/python-modules/charset-normalizer/default.nix
index 5bd8e9acf680..7321c180eb07 100644
--- a/pkgs/development/python-modules/charset-normalizer/default.nix
+++ b/pkgs/development/python-modules/charset-normalizer/default.nix
@@ -3,15 +3,18 @@
   aiohttp,
   buildPythonPackage,
   fetchFromGitHub,
+  mypy,
   pytestCheckHook,
   pythonOlder,
   requests,
+  setuptools,
+  setuptools-scm,
 }:
 
 buildPythonPackage rec {
   pname = "charset-normalizer";
-  version = "3.4.0";
-  format = "setuptools";
+  version = "3.4.1";
+  pyproject = true;
 
   disabled = pythonOlder "3.5";
 
@@ -19,14 +22,22 @@ buildPythonPackage rec {
     owner = "Ousret";
     repo = "charset_normalizer";
     tag = version;
-    hash = "sha256-de6rg/e9RPfuO44+/Uipad75YqZQrnqiSPopfBNOFP8=";
+    hash = "sha256-z6XUXfNJ4+2Gq2O13MgF1D3j/bVBjgAG2wCWLaNgADE=";
   };
 
   postPatch = ''
-    substituteInPlace setup.cfg \
-      --replace " --cov=charset_normalizer --cov-report=term-missing" ""
+    substituteInPlace pyproject.toml \
+      --replace-fail "mypy>=1.4.1,<=1.14.0" mypy
   '';
 
+  build-system = [
+    mypy
+    setuptools
+    setuptools-scm
+  ];
+
+  env.CHARSET_NORMALIZER_USE_MYPYC = "1";
+
   nativeCheckInputs = [ pytestCheckHook ];
 
   pythonImportsCheck = [ "charset_normalizer" ];
@@ -39,7 +50,7 @@ buildPythonPackage rec {
     description = "Python module for encoding and language detection";
     mainProgram = "normalizer";
     homepage = "https://charset-normalizer.readthedocs.io/";
-    changelog = "https://github.com/Ousret/charset_normalizer/blob/${version}/CHANGELOG.md";
+    changelog = "https://github.com/Ousret/charset_normalizer/blob/${src.tag}/CHANGELOG.md";
     license = licenses.mit;
     maintainers = with maintainers; [ fab ];
   };