diff --git a/requirements-dev.txt b/requirements-dev.txt
index 653469670..04f86573f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,6 +2,7 @@ flake8
 Flask<2.0.0
 werkzeug<2.0.0
 sqlalchemy<2.0
+itsdangerous<2.1.0
 MarkupSafe<2.1.0
 jinja2<=3.0.0
 Flask-SQLAlchemy<3.0.0