diff --git a/heartbeat/heartbeat.go b/heartbeat/heartbeat.go
index dfb2c42..f478f69 100644
--- a/heartbeat/heartbeat.go
+++ b/heartbeat/heartbeat.go
@@ -15,6 +15,7 @@ import (
 
 // 心跳
 // 作用：上报实例存活状态
+// 依赖：leader priority
 
 type HeartBeat struct {
 	ctx    context.Context
diff --git a/leader/leader.go b/leader/leader.go
index 0e50cf4..cde8c3f 100644
--- a/leader/leader.go
+++ b/leader/leader.go
@@ -14,6 +14,10 @@ import (
 	"github.com/yuninks/timerx/priority"
 )
 
+// 领导
+// 作用：领导选举，是领导才执行，避免资源浪费
+// 依赖：priority
+
 type Leader struct {
 	ctx    context.Context
 	cancel context.CancelFunc