diff --git a/bower.json b/bower.json
index 036d276..82ce49d 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "reveal.js",
-  "version": "3.8.0",
+  "version": "3.9.0-beta",
   "main": [
     "js/reveal.js",
     "css/reveal.css"
diff --git a/js/reveal.js b/js/reveal.js
index 198a613..1b5fff5 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -26,7 +26,7 @@
 	var Reveal;
 
 	// The reveal.js version
-	var VERSION = '3.8.0';
+	var VERSION = '3.9.0-beta';
 
 	var SLIDES_SELECTOR = '.slides section',
 		HORIZONTAL_SLIDES_SELECTOR = '.slides>section',
diff --git a/package-lock.json b/package-lock.json
index 961fbe2..9704f5d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "reveal.js",
-  "version": "3.8.0",
+  "version": "3.9.0-beta",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index ce3ba94..b4802b1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "reveal.js",
-  "version": "3.8.0",
+  "version": "3.9.0-beta",
   "description": "The HTML Presentation Framework",
   "homepage": "http://revealjs.com",
   "subdomain": "revealjs",