diff --git a/pyproject.toml b/pyproject.toml
index 94e9ce070..c8b144f36 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -71,8 +71,8 @@ dependencies = [
 ]
 
 optional-dependencies.dev = [
-  "mypy==1.18.2",
-  "tomli",        # Needed even on 3.11+ for typechecking with mypy
+  "mypy==1.19",
+  "tomli",      # Needed even on 3.11+ for typechecking with mypy
   "tox",
 ]
 urls = { Homepage = "https://github.com/python/pyperformance" }