diff --git a/requirements.txt b/requirements.txt
index 3b6db7b..759828d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-Flask==0.12
+Flask==0.12.3
 Flask-SocketIO==2.8.2
 gevent==1.2.1
 gevent-websocket==0.9.5