diff --git a/CHANGELOG.md b/CHANGELOG.md
index cbde5184b..95f56a5fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 eMQTT ChangeLog
 ==================
 
-v0.3.1-beta (2015-03-01)
+v0.3.1-beta (2015-03-02)
 ------------------------
 
 Feature: SSL Socket Support
diff --git a/rebar.config b/rebar.config
index bcde0176f..4c6146618 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,10 +1,20 @@
+%% -*- mode: erlang;erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 ft=erlang et
+
 {require_min_otp_vsn, "R17"}.
 
 {erl_opts, [debug_info, {parse_transform, lager_transform}]}.
 
-{erl_opts, [{i, "include"},
+{erl_opts, [warn_export_all,
+            warn_unused_import,
+            {i, "include"},
 			{src_dirs, ["src"]}]}.
 
+{xref_checks, [undefined_function_calls]}.
+{cover_enabled, false}.
+
+{validate_app_modules, true}.
+
 {sub_dirs, [
     "rel", 
     "apps/emqtt"]}.