diff --git a/src/js/proxified-containers.js b/src/js/proxified-containers.js
index 241c86b..d6b7a40 100644
--- a/src/js/proxified-containers.js
+++ b/src/js/proxified-containers.js
@@ -44,7 +44,7 @@ proxifiedContainers = {
 
   // Parses a proxy description string of the format type://host[:port] or type://username:password@host[:port] (port is optional)
   parseProxy(proxy_str, mozillaVpnData = null) {
-    const proxyRegexp = /(?<type>(https?)|(socks4?)):\/\/(\b(?<username>\w+):(?<password>\w+)@)?(?<host>((?:\d{1,3}\.){3}\d{1,3}\b)|(\b([\w.-]+)+))(:(?<port>\d+))?/;
+    const proxyRegexp = /(?<type>(https?)|(socks4?)):\/\/(\b(?<username>[\w-]+):(?<password>[\w-]+)@)?(?<host>((?:\d{1,3}\.){3}\d{1,3}\b)|(\b([\w.-]+)+))(:(?<port>\d+))?/;
     const matches = proxyRegexp.exec(proxy_str);
     if (!matches) {
       return false;