diff --git a/README.md b/README.md
index 42e0c1925..5540cb6ed 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Check out our [wiki](https://github.com/lodash/lodash/wiki/build-differences) fo
 
 * [Modern build](https://raw.github.com/lodash/lodash/2.4.1/dist/lodash.js) ([minified](https://raw.github.com/lodash/lodash/2.4.1/dist/lodash.min.js)) perfect for new environments
 * [Compatibility build](https://raw.github.com/lodash/lodash/2.4.1/dist/lodash.compat.js) ([minified](https://raw.github.com/lodash/lodash/2.4.1/dist/lodash.compat.min.js)) for old environments too
-* [Underscore build](https://raw.github.com/lodash/lodash/2.4.1/dist/lodash.underscore.js) ([minified](https://raw.github.com/lodash/lodash/2.4.1/dist/lodash.underscore.min.js)) as a drop-in replacement for [Underscore.js](http://underscorejs.org/)
+* [Underscore build](https://raw.github.com/lodash/lodash/2.4.1/dist/lodash.underscore.js) ([minified](https://raw.github.com/lodash/lodash/2.4.1/dist/lodash.underscore.min.js)) as a drop-in replacement for [Underscore v1.6.0](http://underscorejs.org/#1.6.0)
 
 CDN copies are available on [cdnjs](http://cdnjs.com/libraries/lodash.js/) & [jsDelivr](http://www.jsdelivr.com/#!lodash). For smaller file sizes, create [custom builds](http://lodash.com/custom-builds) with only the features needed.