diff --git a/bower.json b/bower.json
index 6761e25..b60aa03 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "iron-test-helpers",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "authors": [
     "The Polymer Authors"
   ],