diff --git a/requirements/lint.txt b/requirements/lint.txt
index cc57ccf..c42ec48 100644
--- a/requirements/lint.txt
+++ b/requirements/lint.txt
@@ -7,7 +7,7 @@ flake8-bugbear==21.9.2
 flake8-comprehensions==3.7.0
 flake8-executable==2.1.1
 mccabe==0.6.1
-mypy==0.910
+mypy==0.991
 rstcheck==3.3.1
 Sphinx==4.3.0  # used for rstcheck to enable Sphinx support
 yamllint==1.26.3