diff --git a/pyproject.toml b/pyproject.toml
index ca918aa..36eb664 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ test = [
 ]
 quality = [
     "ruff==0.3.0",
-    "mypy==1.8.0",
+    "mypy==1.9.0",
     "pre-commit>=3.0.0,<4.0.0",
 ]
 docs = [
@@ -77,7 +77,7 @@ dev = [
     "pytest-pretty>=1.0.0,<2.0.0",
     # style
     "ruff==0.3.0",
-    "mypy==1.8.0",
+    "mypy==1.9.0",
     "pre-commit>=3.0.0,<4.0.0",
     # docs
     "sphinx>=3.0.0,!=3.5.0",