diff --git a/requirements-test.txt b/requirements-test.txt
index 3d857a4..38f7a7f 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -2,7 +2,7 @@ bandit==1.7.0
 black==22.6.0
 flake8==3.9.2
 isort==5.9.3
-mypy==0.910
+mypy==0.991
 pytest==6.2.5
 pytest-cov==2.12.1
 pytest-mock==3.6.1