diff --git a/pyproject.toml b/pyproject.toml
index dc6fc665..1fcd632b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,7 +72,7 @@ dependencies = [
 ]
 
 optional-dependencies.dev = [
-  "mypy==1.17.1",
+  "mypy==1.18.2",
   "tomli",        # Needed even on 3.11+ for typechecking with mypy
   "tox",
 ]