diff --git a/libraries/networking/src/AddressManager.cpp b/libraries/networking/src/AddressManager.cpp
index 7a1848174e..40bae46c5a 100644
--- a/libraries/networking/src/AddressManager.cpp
+++ b/libraries/networking/src/AddressManager.cpp
@@ -43,10 +43,10 @@ bool AddressManager::lookupHandledAsNetworkAddress(const QString& lookupString)
     const QString IP_ADDRESS_REGEX_STRING = "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}"
         "([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(:\\d{1,5})?$";
     
-    const QString HOSTNAME_REGEX_STRING = "^(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\\-]{0,61}[a-zA-Z0-9])"
-        "(?:\\.(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\\-]{0,61}[a-zA-Z0-9]))+(:{1}\\d{1,5})?$";
+    const QString HOSTNAME_REGEX_STRING = "^((?:[A-Z0-9]|[A-Z0-9][A-Z0-9\\-]{0,61}[A-Z0-9])"
+        "(?:\\.(?:[A-Z0-9]|[A-Z0-9][A-Z0-9\\-]{0,61}[A-Z0-9]))+|localhost)(:{1}\\d{1,5})?$";
     
-    QRegExp hostnameRegex(HOSTNAME_REGEX_STRING);
+    QRegExp hostnameRegex(HOSTNAME_REGEX_STRING, Qt::CaseInsensitive);
     
     if (hostnameRegex.indexIn(lookupString) != -1) {
         emit domainChangeRequired(hostnameRegex.cap(0));