diff --git a/layersbox b/layersbox
index 31a4b0a..02bc6ee 100755
--- a/layersbox
+++ b/layersbox
@@ -564,7 +564,7 @@ def update_adapter(config, service_directory, service_name):
         # parse nginx.conf of all services to get a list of all proxied containers
         #TODO: make sure to only read URLs after a "proxy_pass"
         with open(join(service_directory, service_name, "nginx.conf")) as f:
-            for w in re.findall('(https?:\/\/[A-Za-z0-9.]+)',f.read()):
+            for w in re.findall('(https?:\/\/[A-Za-z0-9.\-]+)',f.read()):
                 proxied_servers.append(w.replace('http://', ''))
 
     # now get the IPs of the proxied containers