diff --git a/tools/plunker-builder/indexHtmlTranslator.js b/tools/plunker-builder/indexHtmlTranslator.js
index a035825f9c..a32aec4f73 100644
--- a/tools/plunker-builder/indexHtmlTranslator.js
+++ b/tools/plunker-builder/indexHtmlTranslator.js
@@ -4,7 +4,7 @@ module.exports = {
 
 var _rxRules = {
   basehref: {
-    from: /<base href=".*">/,
+    from: /<base href=".*"[/]?>/,
     to: '<script>document.write(\'<base href="\' + document.location + \'" />\');</script>'
   },
   script: {