diff --git a/waves-intro_en.html b/waves-intro_en.html
index a4dcf98..76a6b8e 100644
--- a/waves-intro_en.html
+++ b/waves-intro_en.html
@@ -22,7 +22,7 @@
   window.phet.chipper.packageObject =
     {
       "name": "waves-intro",
-      "version": "1.1.0-dev.25",
+      "version": "1.2.0-dev.0",
       "license": "GPL-3.0",
       "repository": {
         "type": "git",