diff --git a/apps/emqx/src/emqx.app.src b/apps/emqx/src/emqx.app.src
index f837161be..4dd2fca24 100644
--- a/apps/emqx/src/emqx.app.src
+++ b/apps/emqx/src/emqx.app.src
@@ -2,7 +2,7 @@
 {application, emqx, [
     {id, "emqx"},
     {description, "EMQX Core"},
-    {vsn, "5.1.17"},
+    {vsn, "5.1.18"},
     {modules, []},
     {registered, []},
     {applications, [
diff --git a/apps/emqx_ft/src/emqx_ft.app.src b/apps/emqx_ft/src/emqx_ft.app.src
index 8f78bae35..9edc2fd89 100644
--- a/apps/emqx_ft/src/emqx_ft.app.src
+++ b/apps/emqx_ft/src/emqx_ft.app.src
@@ -1,6 +1,6 @@
 {application, emqx_ft, [
     {description, "EMQX file transfer over MQTT"},
-    {vsn, "0.1.11"},
+    {vsn, "0.1.12"},
     {registered, []},
     {mod, {emqx_ft_app, []}},
     {applications, [
diff --git a/apps/emqx_ft/src/emqx_ft_api.erl b/apps/emqx_ft/src/emqx_ft_api.erl
index ace8c7b83..9f43cd1fe 100644
--- a/apps/emqx_ft/src/emqx_ft_api.erl
+++ b/apps/emqx_ft/src/emqx_ft_api.erl
@@ -176,13 +176,13 @@ check_ft_enabled(Params, _Meta) ->
     end.
 
 '/file_transfer'(get, _Meta) ->
-    {200, format_config(emqx_ft_conf:get())};
+    {200, format_config(emqx_ft_conf:get_raw())};
 '/file_transfer'(put, #{body := ConfigIn}) ->
     OldConf = emqx_ft_conf:get_raw(),
     UpdateConf = emqx_utils:deobfuscate(ConfigIn, OldConf),
     case emqx_ft_conf:update(UpdateConf) of
-        {ok, #{config := Config}} ->
-            {200, format_config(Config)};
+        {ok, #{raw_config := RawConfig}} ->
+            {200, format_config(RawConfig)};
         {error, Error = #{kind := validation_error}} ->
             {400, error_msg('INVALID_CONFIG', format_validation_error(Error))};
         {error, Error} ->
@@ -199,13 +199,11 @@ format_page(#{items := Files}) ->
         <<"files">> => lists:map(fun format_file_info/1, Files)
     }.
 
-format_config(Config) ->
-    Schema = emqx_hocon:make_schema(emqx_ft_schema:fields(file_transfer)),
-    hocon_tconf:make_serializable(
-        Schema,
-        emqx_utils_maps:binary_key_map(Config),
-        #{obfuscate_sensitive_values => true}
-    ).
+format_config(RawConf) ->
+    RootKey = <<"file_transfer">>,
+    Opts = #{obfuscate_sensitive_values => true, make_serializable => true},
+    Conf = emqx_config:fill_defaults(emqx_ft_schema, #{RootKey => RawConf}, Opts),
+    maps:get(RootKey, Conf).
 
 format_validation_error(Error) ->
     emqx_logger_jsonfmt:best_effort_json(Error).
diff --git a/apps/emqx_ft/test/emqx_ft_api_SUITE.erl b/apps/emqx_ft/test/emqx_ft_api_SUITE.erl
index 66f770a22..8fbd2eeeb 100644
--- a/apps/emqx_ft/test/emqx_ft_api_SUITE.erl
+++ b/apps/emqx_ft/test/emqx_ft_api_SUITE.erl
@@ -345,6 +345,7 @@ test_configure(Uri, Config) ->
         <<"host">> => <<"localhost">>,
         <<"port">> => 9000,
         <<"bucket">> => <<"emqx">>,
+        <<"url_expire_time">> => <<"2h">>,
         <<"secret_access_key">> => ?SECRET_ACCESS_KEY,
         <<"transport_options">> => #{
             <<"ssl">> => #{
@@ -384,6 +385,8 @@ test_configure(Uri, Config) ->
                                     <<"keyfile">> := <<"/", _KeyFilepath/bytes>>
                                 }
                             },
+                            %% ensure 2h is unchanged
+                            <<"url_expire_time">> := <<"2h">>,
                             <<"secret_access_key">> := <<"******">>
                         }
                     }