diff --git a/pyproject.toml b/pyproject.toml
index 7fae832..2b18e71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,7 +46,7 @@ optional-dependencies.dev = [
     "docformatter==1.7.7",
     "furo==2025.7.19",
     "interrogate==1.7.0",
-    "mypy[faster-cache]==1.17.1",
+    "mypy[faster-cache]==1.18.1",
     "mypy-strict-kwargs==2025.4.3",
     "pre-commit==4.3.0",
     "pylint==3.3.8",