diff --git a/pyproject.toml b/pyproject.toml
index d9a8377d2..89cc1fa8a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ requests = "~2.31"
 deepl = "^1.2.1"
 
 [tool.poetry.dev-dependencies]
-mypy = "~1.8"
+mypy = "~1.9"
 pre-commit = "~3.6"
 pylint = "~3.1"
 pytest = "~8.0"