README.md in fluent-plugin-forest-0.2.4 vs README.md in fluent-plugin-forest-0.3.0

@@ -154,9 +154,13 @@
       </case>
     </match>
 
 In this case, `<route {search,admin}.*>` subsection will be overwritten to add prefix 'other' for tag `service.admin.*`.
 
+### For Configuration DSL
+
+In DSL configurations, `case` is reserved by Ruby itself. Use `pattern` instead of `case`. `pattern` works just as same as `case`. (`v0.3.0` or later.)
+
 ## TODO
 
 * patches welcome!
 
 ## Copyright