set version to `git describe` during rebar compile
diff --git a/src/rexi.app.src b/src/rexi.app.src
index d56a182..75baa77 100644
--- a/src/rexi.app.src
+++ b/src/rexi.app.src
@@ -1,6 +1,6 @@
 {application, rexi, [
     {description, "Lightweight RPC server"},
-    {vsn, "1.2"},
+    {vsn, git},
     {registered, [rexi_sup, rexi_server]},
     {applications, [kernel, stdlib]},
     {mod, {rexi_app,[]}}