diff --git a/requirements.txt b/requirements.txt
index 522c6df..e2bdd7b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-gunicorn==20.1.0
+gunicorn==21.2.0
 Flask==1.1.2
 Flask-MQTT==1.1.1
 Flask-OAuthlib==0.9.6