diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9adbb06..48e8896 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,4 @@
-mypy==1.3.0
+mypy==1.9.0
 pre-commit==3.3.3
 pylint==2.17.4
 pytest-cov