diff --git a/src/iso8601.app.src b/src/iso8601.app.src
index 49c9c95..b25c46f 100644
--- a/src/iso8601.app.src
+++ b/src/iso8601.app.src
@@ -1,6 +1,6 @@
 {application,iso8601,
              [{description,"An ISO 8601 date formating and parsing library for Erlang"},
-              {vsn,"1.2.3"},
+              {vsn,"1.3"},
               {registered,[]},
               {modules,[iso8601]},
               {applications,[kernel,stdlib]},