diff --git a/requirements.txt b/requirements.txt
index ee52e3e..04776b4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ Flask-Session==0.3.2
 Flask-SocketIO==4.3.1
 Flask-SQLAlchemy==2.4.4
 greenlet==0.4.17
-gunicorn==18.0
+gunicorn==26.0.0
 itsdangerous==1.1.0
 Jinja2==2.11.2
 MarkupSafe==1.1.1