diff --git a/requirements_test.txt b/requirements_test.txt
index 5a08f916..05e8e34b 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -12,7 +12,7 @@ faker==4.1.0
 flake8==3.7.8
 flake8-docstrings==1.5.0
 mock-open==1.3.1
-mypy==0.720
+mypy==0.770
 pre-commit==1.18.3
 pycodestyle==2.5.0
 pydocstyle==4.0.1