Use @next.

README.md

@@ -4,7 +4,7 @@ This branch contains the prerelease of D3 4.0. This API is unstable and may chan
 
 ## Installing
 
-If you use NPM, `npm install d3@4.0.0-alpha.4`. Otherwise, download the [latest release](https://github.com/mbostock/d3/releases/latest). The released bundle supports AMD, CommonJS, and vanilla environments. Create a custom build using [Rollup](https://github.com/rollup/rollup) or your preferred bundler. You can also load directly from [d3js.org](https://d3js.org):
+If you use NPM, `npm install d3@next`. Otherwise, download the [latest release](https://github.com/mbostock/d3/releases/latest). The released bundle supports AMD, CommonJS, and vanilla environments. Create a custom build using [Rollup](https://github.com/rollup/rollup) or your preferred bundler. You can also load directly from [d3js.org](https://d3js.org):
 
 ```html
 <script src="https://d3js.org/d3.v4.0.0-alpha.4.min.js"></script>