diff --git a/apps/emqx_rule_engine/src/emqx_rule_engine_app.erl b/apps/emqx_rule_engine/src/emqx_rule_engine_app.erl
index e00d717d1..3ee2f3e98 100644
--- a/apps/emqx_rule_engine/src/emqx_rule_engine_app.erl
+++ b/apps/emqx_rule_engine/src/emqx_rule_engine_app.erl
@@ -29,6 +29,7 @@ start(_Type, _Args) ->
     _ = emqx_rule_engine_sup:start_locker(),
     ok = emqx_rule_engine:load_providers(),
     ok = emqx_rule_engine:refresh_resources(),
+    timer:sleep(3000),
     ok = emqx_rule_engine:refresh_rules(),
     ok = emqx_rule_engine_cli:load(),
     {ok, Sup}.