diff --git a/setup.py b/setup.py
index 701fc30..15e2822 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
         "crcmod"],
     extras_require={
         'test': [
-            'mypy==1.8.0',
+            'mypy==1.9.0',
             'pytest',
             'pytest-cov',
             'pytest-asyncio',