diff --git a/requirements-testing.txt b/requirements-testing.txt
index 3bda193..7f97da5 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -5,6 +5,6 @@ pytest-timeout == 2.3.*
 pytest-xdist == 3.5.*
 black == 24.3.*
 moto[cloudformation,s3] == 4.2.*
-mypy == 1.8.*
+mypy == 1.9.*
 ruff == 0.3.*
 twine == 5.0.*