UPGRADING.md in slack-ruby-bot-server-0.10.0 vs UPGRADING.md in slack-ruby-bot-server-0.11.0

@@ -1,7 +1,21 @@
 Upgrading Slack-Ruby-Bot-Server
 ===============================
 
+### Upgrading to >= 0.11.0
+
+#### Removed Legacy Migrations
+
+Several legacy migrations have been removed, including the code to automatically create a team from a legacy `SLACK_API_TOKEN`, setting `Team#active`, `name` and `team_id`.
+
+See [#101](https://github.com/slack-ruby/slack-ruby-bot-server/pull/101) for more information.
+
+#### Unicorn Dependency
+
+The dependency on `unicorn` has been removed from gemspec. Use `unicorn` or `puma` or another application server as you see fit by explicitly adding a dependency in your Gemfile.
+
+See [#98](https://github.com/slack-ruby/slack-ruby-bot-server/pull/98) for more information.
+
 ### Upgrading to >= 0.10.0
 
 #### New Team Fields
 
 The following fields have been added to `Team`.