diff --git a/rootfs/usr/local/lib/web/backend/requirements.txt b/rootfs/usr/local/lib/web/backend/requirements.txt
index 0c72599..48dbc5d 100644
--- a/rootfs/usr/local/lib/web/backend/requirements.txt
+++ b/rootfs/usr/local/lib/web/backend/requirements.txt
@@ -1,20 +1,20 @@
-backports.ssl-match-hostname==3.5.0.1
-certifi==2018.1.18
+backports.ssl-match-hostname==3.7.0.1
+certifi==2019.9.11
 chardet==3.0.4
-click==6.7
-Flask==1.0.2
+Click==7.0
+Flask==1.1.1
 Flask-Login==0.4.1
-gevent==1.2.2
+gevent==1.4.0
 gevent-websocket==0.10.1
-greenlet==0.4.13
-idna==2.6
-itsdangerous==0.24
-Jinja2==2.10
-MarkupSafe==1.0
-meld3==1.0.2
-requests==2.20.1
-six==1.11.0
-supervisor==3.2.0
-urllib3==1.23
+greenlet==0.4.15
+idna==2.8
+itsdangerous==1.1.0
+Jinja2==2.10.3
+MarkupSafe==1.1.1
+meld3==2.0.0
+requests==2.22.0
+six==1.12.0
+supervisor==4.1.0
+urllib3==1.25.6
 websocket-client==0.47.0
-Werkzeug==0.14.1
+Werkzeug==0.16.0
diff --git a/rootfs/usr/local/lib/web/backend/run.py b/rootfs/usr/local/lib/web/backend/run.py
index 471a19c..f6ba5cc 100755
--- a/rootfs/usr/local/lib/web/backend/run.py
+++ b/rootfs/usr/local/lib/web/backend/run.py
@@ -74,7 +74,7 @@ def main():
 
     def run_server():
         import socket
-        from gevent.wsgi import WSGIServer
+        from gevent.pywsgi import WSGIServer
         from vnc.app import app
 
         # websocket conflict: WebSocketHandler