diff --git a/c_chat_server/requirements.txt b/c_chat_server/requirements.txt
index 762c91d..6d83675 100644
--- a/c_chat_server/requirements.txt
+++ b/c_chat_server/requirements.txt
@@ -5,7 +5,7 @@ certifi==2019.3.9
 cffi==1.12.3
 Click==7.0
 Flask==1.0.2
-Flask-Cors==3.0.7
+Flask-Cors==3.0.9
 Flask-Migrate==2.4.0
 Flask-MySQLdb==0.2.0
 Flask-RESTful==0.3.7