diff --git a/pyproject.toml b/pyproject.toml
index e108b65..7824b4b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,6 +19,7 @@ python-dotenv = ">=0.20.0"
 gunicorn = ">=20.1.0"
 email-validator = ">=1.2.1"
 Flask-Migrate = ">=3.1.0"
+MarkupSafe = ">=2.1.1"
 
 [tool.poetry.dev-dependencies]