diff --git a/setup.cfg b/setup.cfg
index 645648c8081..15cfc9d6009 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -115,7 +115,7 @@ tests =
     flake8-mutable>=1.2.0
     flake8-simplify>=0.14.0
     flake8>=3.0.0
-    mypy>=0.910
+    mypy>=0.910,<1.9
     # https://github.com/pytest-dev/pytest-asyncio/issues/706
     pytest-asyncio>=0.17,!=0.23.*
     pytest-cov>=2.8.0