diff --git a/apps/emqx_exproto/src/emqx_exproto.app.src b/apps/emqx_exproto/src/emqx_exproto.app.src
index 52ce96a54..b450bf16f 100644
--- a/apps/emqx_exproto/src/emqx_exproto.app.src
+++ b/apps/emqx_exproto/src/emqx_exproto.app.src
@@ -1,6 +1,6 @@
 {application, emqx_exproto,
  [{description, "EMQ X Extension for Protocol"},
-  {vsn, "4.3.0"}, %% strict semver
+  {vsn, "4.3.1"}, %% strict semver
   {modules, []},
   {registered, []},
   {mod, {emqx_exproto_app, []}},
diff --git a/apps/emqx_exproto/src/emqx_exproto.appup.src b/apps/emqx_exproto/src/emqx_exproto.appup.src
new file mode 100644
index 000000000..6634cbc53
--- /dev/null
+++ b/apps/emqx_exproto/src/emqx_exproto.appup.src
@@ -0,0 +1,15 @@
+%% -*-: erlang -*-
+{VSN,
+ [
+    {"4.3.0", [
+      {load_module, emqx_exproto_conn, brutal_purge, soft_purge, []}
+    ]},
+    {<<".*">>, []}
+ ],
+ [
+    {"4.3.0", [
+      {load_module, emqx_exproto_conn, brutal_purge, soft_purge, []}
+    ]},
+    {<<".*">>, []}
+ ]
+}.
diff --git a/apps/emqx_exproto/src/emqx_exproto_conn.erl b/apps/emqx_exproto/src/emqx_exproto_conn.erl
index da655bcb4..15bf3ee2e 100644
--- a/apps/emqx_exproto/src/emqx_exproto_conn.erl
+++ b/apps/emqx_exproto/src/emqx_exproto_conn.erl
@@ -17,6 +17,7 @@
 %% TCP/TLS/UDP/DTLS Connection
 -module(emqx_exproto_conn).
 
+-include_lib("esockd/include/esockd.hrl").
 -include_lib("emqx/include/types.hrl").
 -include_lib("emqx/include/logger.hrl").
 
@@ -195,7 +196,12 @@ esockd_ensure_ok_or_exit(Fun, {esockd_transport, Socket}) ->
 esockd_type({udp, _, _}) ->
     udp;
 esockd_type({esockd_transport, Socket}) ->
-    esockd_transport:type(Socket).
+    case esockd_transport:type(Socket) of
+        proxy ->
+            esockd_transport:type(Socket#proxy_socket.socket);
+        Type ->
+            Type
+    end.
 
 esockd_setopts({udp, _, _}, _) ->
     ok;