diff --git a/src/emqx.appup.src b/src/emqx.appup.src
index 30089180f..6ac956ab3 100644
--- a/src/emqx.appup.src
+++ b/src/emqx.appup.src
@@ -132,8 +132,7 @@
    {<<"4.2.9">>, [
      {load_module, emqx_frame, brutal_purge, soft_purge, []},
      {load_module, emqx_connection, brutal_purge, soft_purge, []},
-     {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
-     {load_module, emqx_zone, brutal_purge, soft_purge, []}
+     {load_module, emqx_ws_connection, brutal_purge, soft_purge, []}
    ]},
    {<<".*">>, []}
  ],
diff --git a/src/emqx_limiter.erl b/src/emqx_limiter.erl
index 447e04fea..8acd50d32 100644
--- a/src/emqx_limiter.erl
+++ b/src/emqx_limiter.erl
@@ -23,6 +23,7 @@
         , init/4 %% XXX: Compatible with before 4.2 version
         , info/1
         , check/2
+        , update_overall_limiter/4
         ]).
 
 -record(limiter, {
@@ -152,3 +153,15 @@ is_message_limiter(conn_messages_in) -> true;
 is_message_limiter(conn_messages_routing) -> true;
 is_message_limiter(overall_messages_routing) -> true;
 is_message_limiter(_) -> false.
+
+update_overall_limiter(Zone, Name, Capacity, Interval) ->
+    case is_overall_limiter(Name) of
+        false -> false;
+        _ ->
+            try
+                esockd_limiter:update({Zone, Name}, Capacity, Interval),
+                true
+            catch _:_:_ ->
+                    false
+            end
+    end.
diff --git a/src/emqx_zone.erl b/src/emqx_zone.erl
index 760fbb2cb..6cec6c1ee 100644
--- a/src/emqx_zone.erl
+++ b/src/emqx_zone.erl
@@ -243,7 +243,6 @@ get_env(Zone, Key, Def) ->
 
 -spec(set_env(zone(), atom(), term()) -> ok).
 set_env(Zone, Key, Val) ->
-    on_conf_update(Key, Val, Zone),
     persistent_term:put(?KEY(Zone, Key), Val).
 
 -spec(unset_env(zone(), atom()) -> boolean()).
@@ -297,8 +296,3 @@ do_reload() ->
     [persistent_term:put(?KEY(Zone, Key), Val)
       || {Zone, Opts} <- emqx:get_env(zones, []), {Key, Val} <- Opts].
 
-on_conf_update(overall_messages_routing, {Capacity, Interval}, Zone) ->
-    esockd_limiter:update({Zone, overall_messages_routing}, Capacity, Interval),
-    ok;
-on_conf_update(_, _, _) ->
-    ok.