diff --git a/README.md b/README.md
index 1483a75e..f784300a 100644
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+++ b/README.md
@@ -22,7 +22,7 @@ See also [d3-tile](https://github.com/d3/d3-tile) for examples panning and zoomi
 
 ## Installing
 
-If you use NPM, `npm install d3-zoom`. Otherwise, download the [latest release](https://github.com/d3/d3-zoom/releases/latest). You can also load directly from [d3js.org](https://d3js.org), either as a [standalone library](https://d3js.org/d3-zoom.v2.min.js) or as part of [D3 4.0](https://github.com/d3/d3). AMD, CommonJS, and vanilla environments are supported. In vanilla, a `d3` global is exported:
+If you use NPM, `npm install d3-zoom`. Otherwise, download the [latest release](https://github.com/d3/d3-zoom/releases/latest). You can also load directly from [d3js.org](https://d3js.org), either as a [standalone library](https://d3js.org/d3-zoom.v2.min.js) or as part of [D3](https://github.com/d3/d3). AMD, CommonJS, and vanilla environments are supported. In vanilla, a `d3` global is exported:
 
 ```html
 <script src="https://d3js.org/d3-color.v2.min.js"></script>