diff --git a/c_chat_server/requirements.txt b/c_chat_server/requirements.txt
index 762c91d..54db75f 100644
--- a/c_chat_server/requirements.txt
+++ b/c_chat_server/requirements.txt
@@ -19,7 +19,7 @@ flask-socketio==4.2.0
 gevent==1.4.0
 greenlet==0.4.15
 gunicorn==19.9.0
-Jinja2==2.10.1
+Jinja2==2.11.3
 mysqlclient==1.4.2.post1
 redis==3.2.1
 requests==2.21.0