diff --git a/requirements-dev.txt b/requirements-dev.txt
index 7d8c2930d..57514374e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -13,7 +13,7 @@ flake8==3.9.1
 isort==5.7.0
 
 # Static type checking.
-mypy==0.812
+mypy
 
 # Testing
 pytest