diff --git a/requirements-dev.txt b/requirements-dev.txt
index 562841375..455ce8ccd 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -8,7 +8,7 @@
 
 coveralls==3.3.1
 ruff==0.3.0
-mypy==1.8.0
+mypy==1.9.0
 pre-commit==3.6.2
 pytest==8.1.0
 pytest-asyncio==0.23.5