diff --git a/apps/iot/src/iot_event_period_settings.erl b/apps/iot/src/iot_event_period_settings.erl
index de06053..5ecb8d0 100644
--- a/apps/iot/src/iot_event_period_settings.erl
+++ b/apps/iot/src/iot_event_period_settings.erl
@@ -72,7 +72,7 @@ start_link() ->
     {ok, State :: #state{}} | {ok, State :: #state{}, timeout() | hibernate} |
     {stop, Reason :: term()} | ignore).
 init([]) ->
-    ets:new(?TAB_NAME, [public, set, named_table, {keypos, 2}]),
+    ets:new(?TAB_NAME, [public, set, named_table, {keypos, 2}, {read_concurrency, true}]),
     catch settings(),
     erlang:start_timer(?UPDATE_TICKER * 1000, self(), update_ticker),