diff --git a/pkgs/development/python-modules/cmd2/default.nix b/pkgs/development/python-modules/cmd2/default.nix
index 75e0eedf8dab..3328249acfbb 100644
--- a/pkgs/development/python-modules/cmd2/default.nix
+++ b/pkgs/development/python-modules/cmd2/default.nix
@@ -5,6 +5,7 @@
   fetchPypi,
   glibcLocales,
   gnureadline,
+  prompt-toolkit,
   pyperclip,
   pytest-cov-stub,
   pytest-mock,
@@ -14,27 +15,26 @@
   wcwidth,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "cmd2";
-  version = "3.2.1";
+  version = "4.2.1";
   pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
-    hash = "sha256-bGNyobJs0Uu2IJZTyJ1zAP58FDno3KMPW2tv/bXyFPo=";
+    inherit (finalAttrs) pname version;
+    hash = "sha256-iQIWA6GM60FgDS8CtAxd9NN+QRAnMI6aWHFL4fOla2s=";
   };
 
   build-system = [ setuptools-scm ];
 
   dependencies = [
+    prompt-toolkit
     pyperclip
     rich-argparse
     wcwidth
   ]
   ++ lib.optional stdenv.hostPlatform.isDarwin gnureadline;
 
-  doCheck = true;
-
   nativeCheckInputs = [
     glibcLocales
     pytestCheckHook
@@ -55,8 +55,8 @@ buildPythonPackage rec {
   meta = {
     description = "Enhancements for standard library's cmd module";
     homepage = "https://github.com/python-cmd2/cmd2";
-    changelog = "https://github.com/python-cmd2/cmd2/releases/tag/${version}";
+    changelog = "https://github.com/python-cmd2/cmd2/releases/tag/${finalAttrs.version}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ teto ];
   };
-}
+})