diff --git a/pkgs/python-packages/joinmarket/default.nix b/pkgs/python-packages/joinmarket/default.nix
index b083883..854f1e5 100644
--- a/pkgs/python-packages/joinmarket/default.nix
+++ b/pkgs/python-packages/joinmarket/default.nix
@@ -62,12 +62,22 @@ buildPythonPackage rec {
     pyopenssl
   ];
 
+  # TODO-EXTERNAL:
+  # Remove this when fixed upstream.
+  #
+  # Fix the following error during checkPhase:
+  #   File "/nix/store/...-python3.11-pytest-8.1.1/lib/python3.11/site-packages/_pytest/config/argparsing.py", line 133, in _getparser
+  #     arggroup.add_argument(*n, **a)
+  #   File "/nix/store/...-python3-3.11.9/lib/python3.11/argparse.py", line 1460, in add_argument
+  #     raise ValueError('%r is not callable' % (type_func,))
+  #   ValueError: 'int' is not callable
+  patches = [ ./fix-conftest-arg-type-error.patch ];
+
   postPatch = ''
     substituteInPlace pyproject.toml \
-      --replace-fail 'txtorcon==23.11.0' 'txtorcon==23.5.0' \
-      --replace-fail 'twisted==23.10.0' 'twisted==23.8.0' \
-      --replace-fail 'service-identity==21.1.0' 'service-identity==23.1.0' \
-      --replace-fail 'cryptography==41.0.6' 'cryptography==41.0.3'
+      --replace-fail 'twisted==23.10.0' 'twisted==24.3.0' \
+      --replace-fail 'service-identity==21.1.0' 'service-identity==24.1.0' \
+      --replace-fail 'cryptography==41.0.6' 'cryptography==42.0.5'
 
     # Modify pyproject.toml to include only specific modules. Do not include 'jmqtui'.
     sed -i '/^\[tool.setuptools.packages.find\]/a include = ["jmbase", "jmbitcoin", "jmclient", "jmdaemon"]' pyproject.toml
diff --git a/pkgs/python-packages/joinmarket/fix-conftest-arg-type-error.patch b/pkgs/python-packages/joinmarket/fix-conftest-arg-type-error.patch
new file mode 100644
index 0000000..a8f2743
--- /dev/null
+++ b/pkgs/python-packages/joinmarket/fix-conftest-arg-type-error.patch
@@ -0,0 +1,17 @@
+diff --git a/conftest.py b/conftest.py
+index 1cc56d5..54b0a4c 100644
+--- a/conftest.py
++++ b/conftest.py
+@@ -74,12 +74,6 @@ def pytest_addoption(parser: Any) -> None:
+                      action="store",
+                      default='bitcoinrpc',
+                      help="the RPC username for your test bitcoin instance (default=bitcoinrpc)")
+-    parser.addoption("--nirc",
+-                     type="int",
+-                     action="store",
+-                     default=1,
+-                     help="the number of local miniircd instances")
+-
+ 
+ @pytest.fixture(scope="session", autouse=True)
+ def setup_early_if_needed(request) -> None: