Add pub package badge.
diff --git a/README.md b/README.md
index e27d663..0256472 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@
 interact with the Dart SDK (such as the [analyzer][analyzer]).
 
 [![Build Status](https://travis-ci.org/dart-lang/cli_util.svg)](https://travis-ci.org/dart-lang/cli_util)
+[![Pub](https://img.shields.io/pub/v/cli_util.svg)](https://pub.dartlang.org/packages/cli_util)
 
 ## Locating the Dart SDK