diff --git a/dev-requirements.txt b/dev-requirements.txt
index b5373ab..95077b9 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -3,7 +3,7 @@
 black==19.10b0
 flake8==3.7.9
 isort==4.3.21
-mypy==0.761
+mypy==0.770
 flake8-bugbear==20.1.4
 flake8-builtins==1.4.2
 flake8-comprehensions==3.1.4