diff --git a/package-lock.json b/package-lock.json
index 378b8e1f8..fc717c5f9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "polymer-starter-kit",
-  "version": "4.0.0-pre.1",
+  "version": "4.0.0-pre.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 2d2190fbb..0eeeb1257 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "polymer-starter-kit",
-  "version": "4.0.0-pre.1",
+  "version": "4.0.0-pre.2",
   "description": "A starting point for Polymer apps",
   "author": "The Polymer Authors",
   "license": "BSD-3-Clause",