README.md in drg-0.2.1 vs README.md in drg-0.3.0

@@ -26,10 +26,17 @@
 
 ```bash
 rake drg:pin
 ```
 
-Will also try to update all your gems to the most recent version (coming soon).
+### Updating Gems
+
+DRG can also try to update all outdated gems to the most recent version. It'll update the gem and run your tests. If your
+tests pass, then it'll update your gemfile with the current version. Similar to what Gemnasium offers.
+
+```bash
+rake drg:update
+```
 
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake false` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.