diff --git a/engine.go b/engine.go
index caa38eb..8f20957 100644
--- a/engine.go
+++ b/engine.go
@@ -44,16 +44,16 @@ func NewEngine(conf config.EngineConf, opts ...RunOption) *Engine {
 		},
 	}
 
-	for _, opt := range opts {
-		opt(ngin)
-	}
-
 	if ngin.pool == nil {
 		ngin.pool, _ = ants.NewPool(math.MaxInt32)
 	}
 
 	ngin.evtMgr = event.NewEventManager(ngin.pool)
 
+	for _, opt := range opts {
+		opt(ngin)
+	}
+
 	return ngin
 }