diff --git a/pkgs/by-name/pr/pretix-banktool/package.nix b/pkgs/by-name/pr/pretix-banktool/package.nix
index 1223a21590efe..00634df8a597b 100644
--- a/pkgs/by-name/pr/pretix-banktool/package.nix
+++ b/pkgs/by-name/pr/pretix-banktool/package.nix
@@ -4,7 +4,14 @@
   fetchFromGitHub,
 }:
 
-python3Packages.buildPythonApplication (finalAttrs: {
+let
+  pythonPackages = python3Packages.overrideScope (
+    self: super: {
+      fints = self.fints_4;
+    }
+  );
+in
+pythonPackages.buildPythonApplication (finalAttrs: {
   pname = "pretix-banktool";
   version = "1.1.0";
   pyproject = true;
@@ -16,9 +23,9 @@ python3Packages.buildPythonApplication (finalAttrs: {
     hash = "sha256-x6P+WqrOak5/gmMEmBkHrx6kPsbSOAXbKRbndFG3IJU=";
   };
 
-  build-system = with python3Packages; [ setuptools ];
+  build-system = with pythonPackages; [ setuptools ];
 
-  dependencies = with python3Packages; [
+  dependencies = with pythonPackages; [
     click
     fints
     requests
diff --git a/pkgs/development/python-modules/fints/4.nix b/pkgs/development/python-modules/fints/4.nix
new file mode 100644
index 0000000000000..089e022842ebb
--- /dev/null
+++ b/pkgs/development/python-modules/fints/4.nix
@@ -0,0 +1,53 @@
+{
+  lib,
+  buildPythonPackage,
+  setuptools,
+  fetchFromGitHub,
+  bleach,
+  mt-940,
+  pretix-banktool,
+  requests,
+  sepaxml,
+  pytestCheckHook,
+  pytest-mock,
+}:
+
+buildPythonPackage rec {
+  version = "4.2.4";
+  pname = "fints";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "raphaelm";
+    repo = "python-fints";
+    tag = "v${version}";
+    hash = "sha256-la5vpWBoZ7hZsAyjjCqHpFfOykDVosI/S9amox1dmzY=";
+  };
+
+  pythonRemoveDeps = [ "enum-tools" ];
+
+  build-system = [ setuptools ];
+
+  dependencies = [
+    bleach
+    mt-940
+    requests
+    sepaxml
+  ];
+
+  __darwinAllowLocalNetworking = true;
+
+  pythonImportsCheck = [ "fints" ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+    pytest-mock
+  ];
+
+  meta = {
+    homepage = "https://github.com/raphaelm/python-fints/";
+    description = "Pure-python FinTS (formerly known as HBCI) implementation";
+    license = lib.licenses.lgpl3Only;
+    inherit (pretix-banktool.meta) maintainers;
+  };
+}
diff --git a/pkgs/development/python-modules/fints/default.nix b/pkgs/development/python-modules/fints/default.nix
index ecd12bedf238f..ff1fd5cd52a33 100644
--- a/pkgs/development/python-modules/fints/default.nix
+++ b/pkgs/development/python-modules/fints/default.nix
@@ -4,6 +4,7 @@
   setuptools,
   fetchFromGitHub,
   bleach,
+  lxml,
   mt-940,
   requests,
   sepaxml,
@@ -12,7 +13,7 @@
 }:
 
 buildPythonPackage rec {
-  version = "4.2.4";
+  version = "5.0.0";
   pname = "fints";
   pyproject = true;
 
@@ -20,7 +21,7 @@ buildPythonPackage rec {
     owner = "raphaelm";
     repo = "python-fints";
     tag = "v${version}";
-    hash = "sha256-la5vpWBoZ7hZsAyjjCqHpFfOykDVosI/S9amox1dmzY=";
+    hash = "sha256-ll2+PtcGQiY5nbQTKVetd2ecDBVSXgzWP4Vzzri1Trs=";
   };
 
   pythonRemoveDeps = [ "enum-tools" ];
@@ -29,6 +30,7 @@ buildPythonPackage rec {
 
   dependencies = [
     bleach
+    lxml
     mt-940
     requests
     sepaxml
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index c92fd0b9d7f33..11a9812d25fc5 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5466,6 +5466,8 @@ self: super: with self; {
 
   fints = callPackage ../development/python-modules/fints { };
 
+  fints_4 = callPackage ../development/python-modules/fints/4.nix { };
+
   finvizfinance = callPackage ../development/python-modules/finvizfinance { };
 
   fiona = callPackage ../development/python-modules/fiona { };