UPGRADING.md in wine_bouncer-0.1.2 vs UPGRADING.md in wine_bouncer-0.2.0

@@ -1,4 +1,22 @@
 Upgrading WineBouncer
 =====================
 
+
+### Upgrading to >= 0.2.0
+
+To use the `resource_owner` you now need to define how WineBouncer gets the resource owner. In most cases he needs to return the User that is logged in, but not in all cases.
+You now additionally need to specify `define_resource_owner` in your configuration. Mostly this the following code will work:
+
+``` ruby
+WineBouncer.configure do |c|
+  .......
+  c.define_resource_owner do
+    User.find(doorkeeper_access_token.resource_owner_id) if doorkeeper_access_token
+  end
+end
+```
+
+The required Grape version is now from 0.8 and above.
+
+------
 From version 0.1.0 upgrade instructions are given.
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