diff --git a/requirements-dev.txt b/requirements-dev.txt
index 870a0e1b9..f68fe8814 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -7,4 +7,4 @@ pytest-mock==1.10.0
 pytest-asyncio==0.10.0
 pytest-cov==2.6.1
 coveralls==1.5.1
-mypy==0.650
+mypy==0.660