diff --git a/src/emqx_protocol.erl b/src/emqx_protocol.erl
index 1bbfc2e05..343faedec 100644
--- a/src/emqx_protocol.erl
+++ b/src/emqx_protocol.erl
@@ -947,7 +947,7 @@ do_flapping_detect(Action, #pstate{zone = Zone,
                                    client_id = ClientId,
                                    enable_flapping_detect = true}) ->
     BanExpiryInterval = emqx_zone:get_env(Zone, flapping_ban_expiry_interval, 3600000),
-    Threshold = emqx_zone:get_env(Zone, flapping_threshold, 20),
+    Threshold = emqx_zone:get_env(Zone, flapping_threshold, {10, 60}),
     Until = erlang:system_time(second) + BanExpiryInterval,
     case emqx_flapping:check(Action, ClientId, Threshold) of
         flapping ->