diff --git a/requirements/code_style.txt b/requirements/code_style.txt
index 86c4011..1788d70 100644
--- a/requirements/code_style.txt
+++ b/requirements/code_style.txt
@@ -4,4 +4,5 @@ pylint
 flake8
 isort
 pre-commit
-mypy
+mypy<=0.256; python_version <= '2.7'
+mypy; python_version >= '2.7'