diff --git a/proxy/proxy.conf b/proxy/proxy.conf
index 8f9f192..7d91bba 100644
--- a/proxy/proxy.conf
+++ b/proxy/proxy.conf
@@ -13,7 +13,7 @@ server {
       listen 80;
       listen [::]:80;
 
-      server_name "~^(port-(?<port>.*)\.)?(?<container>.*)\.{PROXY_DOMAIN}";
+      server_name "~^(port-(?<port>.+)\.)?(?<container>.*)\.{PROXY_DOMAIN}";
 
       location / {
             if ($port = "") {