diff --git a/pyproject.toml b/pyproject.toml
index a85b68e..f583409 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@ darglint = "^1.4.1"
 isort = {extras = ["pyproject"], version = "^4.3.21"}
 pyupgrade = "^2.6.1"
 black = "^19.10b0"
-mypy = "^0.780"
+mypy = "^0.990"
 bandit = "^1.6.2"
 safety = "^1.9.0"
 pytest = "^5.4.3"