diff --git a/utils/novnc_proxy b/utils/novnc_proxy
index ea3ea706..94eee4b0 100755
--- a/utils/novnc_proxy
+++ b/utils/novnc_proxy
@@ -193,7 +193,7 @@ fi
 
 echo "Starting webserver and WebSockets proxy on port ${PORT}"
 #${HERE}/websockify --web ${WEB} ${CERT:+--cert ${CERT}} ${PORT} ${VNC_DEST} &
-${WEBSOCKIFY} ${SYSLOG_ARG} ${SSLONLY} ${FILEONLY_ARG} --web ${WEB} ${CERT:+--cert ${CERT}} ${KEY:+--key ${KEY}} ${PORT} ${VNC_DEST} ${HEARTBEAT_ARG} ${IDLETIMEOUT_ARG} ${RECORD_ARG} ${TIMEOUT_ARG} ${WEBAUTH_ARG} ${AUTHPLUGIN_ARG} ${AUTHSOURCE_ARG} &
+${WEBSOCKIFY} ${SYSLOG_ARG} ${SSLONLY} ${FILEONLY_ARG} --web ${WEB} ${CERT:+--cert "${CERT}"} ${KEY:+--key "${KEY}"} ${PORT} ${VNC_DEST} ${HEARTBEAT_ARG} ${IDLETIMEOUT_ARG} ${RECORD_ARG} ${TIMEOUT_ARG} ${WEBAUTH_ARG} ${AUTHPLUGIN_ARG} ${AUTHSOURCE_ARG} &
 proxy_pid="$!"
 sleep 1
 if [ -z "$proxy_pid" ] || ! ps -eo pid= | grep -w "$proxy_pid" > /dev/null; then