bump version number
diff --git a/test/erl/src/thrift_test.app.src b/test/erl/src/thrift_test.app.src
index 9d68a56..b78fc29 100644
--- a/test/erl/src/thrift_test.app.src
+++ b/test/erl/src/thrift_test.app.src
@@ -22,7 +22,7 @@
   {description, "Thrift cross language test"},
 
   % The version of the applicaton
-  {vsn, "0.20.0"},
+  {vsn, "0.21.0"},
 
   % All modules used by the application.
   {modules, [