diff --git a/requirements.txt b/requirements.txt
index 2c0f10b..436476d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@
 pystan==3.7.0
 
 fastapi==0.95.2
-gunicorn==20.1.0
+gunicorn==22.0.0
 uvicorn==0.22.0
 
 prophet==1.1.3