diff --git a/apps/emqx_bridge/src/emqx_bridge.app.src b/apps/emqx_bridge/src/emqx_bridge.app.src
index cfaa25255..30930c494 100644
--- a/apps/emqx_bridge/src/emqx_bridge.app.src
+++ b/apps/emqx_bridge/src/emqx_bridge.app.src
@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, emqx_bridge, [
     {description, "EMQX bridges"},
-    {vsn, "0.2.2"},
+    {vsn, "0.2.3"},
     {registered, [emqx_bridge_sup]},
     {mod, {emqx_bridge_app, []}},
     {applications, [
diff --git a/apps/emqx_bridge/src/emqx_bridge_api.erl b/apps/emqx_bridge/src/emqx_bridge_api.erl
index 5a862c492..244326ee9 100644
--- a/apps/emqx_bridge/src/emqx_bridge_api.erl
+++ b/apps/emqx_bridge/src/emqx_bridge_api.erl
@@ -55,6 +55,8 @@
 %% only for testing/mocking
 -export([supported_versions/1]).
 
+-export([format_bridge_metrics/1, format_metrics/1]).
+
 -define(BPAPI_NAME, emqx_bridge).
 
 -define(BRIDGE_NOT_ENABLED,