diff --git a/experimental/babel-preset-env/README.md b/experimental/babel-preset-env/README.md
index d66b64520d..a4f88006a4 100644
--- a/experimental/babel-preset-env/README.md
+++ b/experimental/babel-preset-env/README.md
@@ -12,6 +12,7 @@ $ npm install --save-dev babel-preset-env
 
 ### Options
 
+* `targets` - an object of browsers/environment versions to support. The data for this is currently at: https://github.com/babel/babel-preset-env/blob/master/src/plugins.js (It would be nice to move this to use a data source like kangax.github.io/compat-table). And we would like help to make the data is correct!
 * `loose` - Enable "loose" transformations for any plugins in this preset that allow them (Disabled by default).
 * `modules` - Enable transformation of ES6 module syntax to another module type (Enabled by default to `"commonjs"`).
   * Can be `false` to not transform modules, or one of `["amd", "umd", "systemjs", "commonjs"]`
@@ -20,7 +21,9 @@ $ npm install --save-dev babel-preset-env
 {
   "presets": [
     ["env", {
-      "chrome": 49,
+      "target": {
+        "chrome": 52
+      },
       "loose": true,
       "modules": false
     }]