diff --git a/requirements-dev.txt b/requirements-dev.txt
index 840eff15f..91b33c573 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -7,7 +7,7 @@ coveralls==2.0.0
 flake8==3.8.3
 flake8-type-annotations==0.1.0
 flake8-tidy-imports==4.1.0
-mypy==0.780
+mypy==0.781
 pytest==5.4.3
 pytest-asyncio==0.12.0
 pytest-cov==2.10.0