diff --git a/pyproject.toml b/pyproject.toml
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ rich = "^11.2.0"
 mypy = "^0.931"
 black = "^22.1.0"
 isort = "^5.10.1"
+vermin = "^1.3.3"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]