diff --git a/pyproject.toml b/pyproject.toml
index e6a585e76..e20fd2785 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -60,8 +60,8 @@ changelog = "https://github.com/hardbyte/python-can/blob/develop/CHANGELOG.md"
 lint = [
     "pylint==2.17.*",
     "ruff==0.0.292",
-    "black==23.3.*",
-    "mypy==1.3.*",
+    "black==23.9.*",
+    "mypy==1.5.*",
 ]
 seeedstudio = ["pyserial>=3.0"]
 serial = ["pyserial~=3.0"]