diff --git a/src/node/hooks/express/static.js b/src/node/hooks/express/static.js
index 34fce29e..ef41865e 100644
--- a/src/node/hooks/express/static.js
+++ b/src/node/hooks/express/static.js
@@ -17,11 +17,12 @@ exports.expressCreateServer = function (hook_name, args, cb) {
 
   // Setup middleware that will package JavaScript files served by minify for
   // CommonJS loader on the client-side.
+  // Hostname "invalid.invalid" is a dummy value to allow parsing as a URI.
   var jsServer = new (Yajsml.Server)({
     rootPath: 'javascripts/src/'
-  , rootURI: 'http://localhost:' + settings.port + '/static/js/'
+  , rootURI: 'http://invalid.invalid/static/js/'
   , libraryPath: 'javascripts/lib/'
-  , libraryURI: 'http://localhost:' + settings.port + '/static/plugins/'
+  , libraryURI: 'http://invalid.invalid/static/plugins/'
   , requestURIs: minify.requestURIs // Loop-back is causing problems, this is a workaround.
   });
 
diff --git a/src/node/utils/Minify.js b/src/node/utils/Minify.js
index a56e347d..4596f404 100644
--- a/src/node/utils/Minify.js
+++ b/src/node/utils/Minify.js
@@ -264,7 +264,8 @@ function getAceFile(callback) {
     async.forEach(founds, function (item, callback) {
       var filename = item.match(/"([^"]*)"/)[1];
 
-      var baseURI = 'http://localhost:' + settings.port;
+      // Hostname "invalid.invalid" is a dummy value to allow parsing as a URI.
+      var baseURI = 'http://invalid.invalid';
       var resourceURI = baseURI + path.normalize(path.join('/static/', filename));
       resourceURI = resourceURI.replace(/\\/g, '/'); // Windows (safe generally?)