diff --git a/pyproject.toml b/pyproject.toml
index b4b968f..c6d32ab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ tqdm = "^4.66.2"
 pytest = ">=6"
 flake8 = "^4.0.1"
 pytest-cov = "^4.1.0"
-mypy = "^0.971"
+mypy = "^0.991"
 python-semantic-release = "^7.24.0"
 black = "^22.3.0"
 syrupy = "^4.0.8"