diff --git a/npm-react/package.json b/npm-react/package.json
index 7b1d5335ef..727ffcd902 100644
--- a/npm-react/package.json
+++ b/npm-react/package.json
@@ -1,7 +1,7 @@
 {
   "name": "react",
   "description": "React is a JavaScript library for building user interfaces.",
-  "version": "0.13.0",
+  "version": "0.13.1-alpha",
   "keywords": [
     "react"
   ],
diff --git a/package.json b/package.json
index 50f6b0c772..6bc6e351d5 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "react-tools",
   "description": "A set of complementary tools to React, including the JSX transformer.",
-  "version": "0.13.0",
+  "version": "0.13.1-alpha",
   "keywords": [
     "react",
     "jsx",
diff --git a/src/browser/ui/React.js b/src/browser/ui/React.js
index b573432bd5..e9ac80014b 100644
--- a/src/browser/ui/React.js
+++ b/src/browser/ui/React.js
@@ -143,6 +143,6 @@ if (__DEV__) {
   }
 }
 
-React.version = '0.13.0';
+React.version = '0.13.1-alpha';
 
 module.exports = React;