diff --git a/web/rootfs/defaults/meet.conf b/web/rootfs/defaults/meet.conf
index 97f230e..e7fc84e 100644
--- a/web/rootfs/defaults/meet.conf
+++ b/web/rootfs/defaults/meet.conf
@@ -53,7 +53,7 @@ location ~ ^/(libs|css|static|images|fonts|lang|sounds|connection_optimization|.
 
 {{ if $ENABLE_COLIBRI_WEBSOCKET }}
 # colibri (JVB) websockets
-location ~ ^/colibri-ws/([a-zA-Z0-9-\.]+)/(.*) {
+location ~ ^/colibri-ws/([a-zA-Z0-9-\._]+)/(.*) {
     tcp_nodelay on;
 
     proxy_http_version 1.1;