diff --git a/pyproject.toml b/pyproject.toml
index 9551a3d..00a1460 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ Repository = "https://github.com/LouieSlocombe/template_python"
 [dependency-groups]
 dev = [
   "build>=1.6.0",
-  "mypy>=2.3.0",
+  "mypy>=2.3.1",
   "pre-commit>=4.6.2",
   "pytest>=9.1.1",
   "pytest-cov>=7.1.0",