diff --git a/pyproject.toml b/pyproject.toml
index a6c8c6ce..172c7238 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ optional-dependencies.dev = [
     "freezegun==1.5.5",
     "furo==2025.12.19",
     "interrogate==1.7.0",
-    "mypy[faster-cache]==1.19.1",
+    "mypy[faster-cache]==1.20.0",
     "mypy-strict-kwargs==2026.1.12",
     "prek==0.3.8",
     "pydocstringformatter==0.7.5",