diff --git a/dev-requirements.txt b/dev-requirements.txt
index 9b56b2a9d..4fed18020 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,5 +1,5 @@
 Flask>=1.1
-mypy>=0.761
+mypy==0.812
 mypy-extensions>=0.4.3
 flake8>=3.7.9 
 aiohttp>=3.6.2