diff --git a/requirements.txt b/requirements.txt
index 84412031..c96ad62c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ Flask-Assets==2.0
 Flask-SQLAlchemy==2.4.3
 gunicorn==20.0.4
 humanize==0.5.1
-idna==2.8
+idna==2.9
 importlib-metadata==1.6.0
 itsdangerous==1.1.0
 Jinja2==2.11.2