diff --git a/mause_rpc/server.py b/mause_rpc/server.py
index 22d2ba6..0e844ff 100644
--- a/mause_rpc/server.py
+++ b/mause_rpc/server.py
@@ -6,7 +6,7 @@
 import socket
 from dataclasses import dataclass, field
 from functools import partial
-from typing import Callable, Dict, Optional, TypeVar, overload, NoReturn
+from typing import Callable, Dict, NoReturn, Optional, TypeVar, overload
 
 import dill
 import pika
diff --git a/poetry.lock b/poetry.lock
index 83d4a98..6009aa9 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -221,17 +221,18 @@ files = [
 
 [[package]]
 name = "dill"
-version = "0.3.7"
+version = "0.4.0"
 description = "serialize all of Python"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.8"
 files = [
-    {file = "dill-0.3.7-py3-none-any.whl", hash = "sha256:76b122c08ef4ce2eedcd4d1abd8e641114bfc6c2867f49f3c41facf65bf19f5e"},
-    {file = "dill-0.3.7.tar.gz", hash = "sha256:cc1c8b182eb3013e24bd475ff2e9295af86c1a38eb1aff128dac8962a9ce3c03"},
+    {file = "dill-0.4.0-py3-none-any.whl", hash = "sha256:44f54bf6412c2c8464c14e8243eb163690a9800dbe2c367330883b19c7561049"},
+    {file = "dill-0.4.0.tar.gz", hash = "sha256:0633f1d2df477324f53a895b02c901fb961bdbf65a17122586ea7019292cbcf0"},
 ]
 
 [package.extras]
 graph = ["objgraph (>=1.7.2)"]
+profile = ["gprof2dot (>=2022.7.29)"]
 
 [[package]]
 name = "distlib"
@@ -1018,4 +1019,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8.1"
-content-hash = "0bdf6bf4b2849319662149caa02343895adfc1aef78e42b01486ebfc616db55a"
+content-hash = "b6ee2a36b38a9ec822da3c9389aa4f49042876380c601b88ca2bac2b48cd068c"
diff --git a/pyproject.toml b/pyproject.toml
index 32aef05..02ead02 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ classifiers = [
 
 [tool.poetry.dependencies]
 python = "^3.8.1"
-dill = "^0.3.1"
+dill = "^0.4.0"
 pika = "^1.1.0"
 retry = "^0.9.2"