diff --git a/scripts/update/centos.sh b/scripts/update/centos.sh
index 4ccc71d19..a3dfe6230 100755
--- a/scripts/update/centos.sh
+++ b/scripts/update/centos.sh
@@ -38,10 +38,12 @@ else
 fi
 
 
+pip3 install gevent==21.1.2
+pip3 install gevent-websocket==0.10.1
+pip3 install requests==2.20.0
+pip3 install flask_caching flask_session
+pip3 install flask_socketio psutil pymongo
 
-pip3 install gevent flask gunicorn flask_caching flask_session
-pip3 install flask_socketio gevent-websocket psutil pymongo
-pip3 install requests
 
 
 if [ -f /etc/init.d/mw ]; then