diff --git a/apps/iot/src/endpoint/endpoint_sup.erl b/apps/iot/src/endpoint/endpoint_sup.erl
index 59bcec0..ad59018 100644
--- a/apps/iot/src/endpoint/endpoint_sup.erl
+++ b/apps/iot/src/endpoint/endpoint_sup.erl
@@ -30,19 +30,19 @@ start_link() ->
 init([]) ->
     SupFlags = #{strategy => one_for_one, intensity => 1000, period => 3600},
     Endpoints = iot_api:get_all_endpoints(),
-    ChildSpecs = lists:flatmap(fun(EndpointInfo) ->
+    ChildSpecs = lists:filtermap(fun(EndpointInfo) ->
         case endpoint:endpoint_record(EndpointInfo) of
             error ->
-                [];
+                false;
             {ok, Endpoint} ->
                 case endpoint:is_support(endpoint:get_protocol(Endpoint)) of
                     true ->
-                        [child_spec(Endpoint)];
+                        {true, child_spec(Endpoint)};
                     false ->
-                        []
+                        false
                 end
         end
-                               end, Endpoints),
+                                 end, Endpoints),
     {ok, {SupFlags, ChildSpecs}}.
 
 -spec ensured_endpoint_started(Endpoint :: #endpoint{}) -> {ok, Pid :: pid()} | {error, Reason :: any()}.