diff --git a/nixos/modules/services/networking/magic-wormhole-mailbox-server.nix b/nixos/modules/services/networking/magic-wormhole-mailbox-server.nix
index 5b700269037c..f2bb40bae31e 100644
--- a/nixos/modules/services/networking/magic-wormhole-mailbox-server.nix
+++ b/nixos/modules/services/networking/magic-wormhole-mailbox-server.nix
@@ -9,7 +9,7 @@ let
   cfg = config.services.magic-wormhole-mailbox-server;
   # keep semicolon in dataDir for backward compatibility
   dataDir = "/var/lib/magic-wormhole-mailbox-server;";
-  python = pkgs.python311.withPackages (
+  python = pkgs.python3.withPackages (
     py: with py; [
       magic-wormhole-mailbox-server
       twisted
diff --git a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
index d98cfa259579..8ee9ab16ef3d 100644
--- a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
+++ b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
@@ -3,46 +3,31 @@
   stdenv,
   buildPythonPackage,
   fetchPypi,
-  fetchpatch,
   setuptools,
-  six,
   attrs,
   twisted,
   autobahn,
   treq,
-  mock,
   nixosTests,
-  pythonOlder,
-  pythonAtLeast,
   pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "magic-wormhole-mailbox-server";
-  version = "0.4.1";
+  version = "0.5.1";
   pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-GvEFkpCcqvUZwA5wbqyELF53+NQ1YhX+nGHHsiWKiPs=";
+    hash = "sha256-oAegNnIpMgRldoHb9QIEXW1YF8V/mq4vIibm6hoAjKE=";
   };
 
-  patches = [
-    (fetchpatch {
-      # Remove the 'U' open mode removed, https://github.com/magic-wormhole/magic-wormhole-mailbox-server/pull/34
-      name = "fix-for-python-3.11.patch";
-      url = "https://github.com/magic-wormhole/magic-wormhole-mailbox-server/commit/4b358859ba80de37c3dc0a5f67ec36909fd48234.patch";
-      hash = "sha256-RzZ5kD+xhmFYusVzAbGE+CODXtJVR1zN2rZ+VGApXiQ=";
-    })
-  ];
-
   build-system = [ setuptools ];
 
   dependencies = [
     attrs
     autobahn
     setuptools # pkg_resources is referenced at runtime
-    six
     twisted
   ] ++ autobahn.optional-dependencies.twisted ++ twisted.optional-dependencies.tls;
 
@@ -51,7 +36,6 @@ buildPythonPackage rec {
   nativeCheckInputs = [
     pytestCheckHook
     treq
-    mock
   ];
 
   disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
@@ -69,7 +53,5 @@ buildPythonPackage rec {
     changelog = "https://github.com/magic-wormhole/magic-wormhole-mailbox-server/blob/${version}/NEWS.md";
     license = lib.licenses.mit;
     maintainers = [ lib.maintainers.mjoerg ];
-    # Python 3.12 support: https://github.com/magic-wormhole/magic-wormhole-mailbox-server/issues/41
-    broken = pythonOlder "3.7" || pythonAtLeast "3.12";
   };
 }
diff --git a/pkgs/development/python-modules/magic-wormhole/default.nix b/pkgs/development/python-modules/magic-wormhole/default.nix
index 87404ab5b21e..f85cfd295954 100644
--- a/pkgs/development/python-modules/magic-wormhole/default.nix
+++ b/pkgs/development/python-modules/magic-wormhole/default.nix
@@ -28,7 +28,6 @@
   # tests
   nettools,
   unixtools,
-  mock,
   magic-wormhole-transit-relay,
   magic-wormhole-mailbox-server,
   pytestCheckHook,
@@ -81,16 +80,9 @@ buildPythonPackage rec {
   };
 
   nativeCheckInputs =
-    # For Python 3.12, remove magic-wormhole-mailbox-server and magic-wormhole-transit-relay from test dependencies,
-    # which are not yet supported with this version.
-    lib.optionals
-      (!magic-wormhole-mailbox-server.meta.broken && !magic-wormhole-transit-relay.meta.broken)
-      [
-        magic-wormhole-mailbox-server
-        magic-wormhole-transit-relay
-      ]
-    ++ [
-      mock
+    [
+      magic-wormhole-mailbox-server
+      magic-wormhole-transit-relay
       pytestCheckHook
     ]
     ++ optional-dependencies.dilation
@@ -98,20 +90,6 @@ buildPythonPackage rec {
 
   __darwinAllowLocalNetworking = true;
 
-  disabledTestPaths =
-    # For Python 3.12, remove the tests depending on magic-wormhole-mailbox-server and magic-wormhole-transit-relay,
-    # which are not yet supported with this version.
-    lib.optionals
-      (magic-wormhole-mailbox-server.meta.broken || magic-wormhole-transit-relay.meta.broken)
-      [
-        "src/wormhole/test/dilate/test_full.py"
-        "src/wormhole/test/test_args.py"
-        "src/wormhole/test/test_cli.py"
-        "src/wormhole/test/test_transit.py"
-        "src/wormhole/test/test_wormhole.py"
-        "src/wormhole/test/test_xfer_util.py"
-      ];
-
   postInstall = ''
     install -Dm644 docs/wormhole.1 $out/share/man/man1/wormhole.1
   '';