diff --git a/requirements.txt b/requirements.txt
index 9589168..d517ea1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ Flask-Bootstrap==3.3.7.1
 Flask-Migrate==2.5.3
 Flask-SQLAlchemy==2.4.4
 Flask-WTF==0.14.3
-gunicorn==20.0.4
+gunicorn==21.2.0
 idna==2.10
 itsdangerous==1.1.0
 Jinja2==2.11.2