diff --git a/lib/src/main/java/com/github/wangyiqian/stockchart/entities/EmptyKEntity.kt b/lib/src/main/java/com/github/wangyiqian/stockchart/entities/EmptyKEntity.kt
index 4147d43..2ccf0e1 100644
--- a/lib/src/main/java/com/github/wangyiqian/stockchart/entities/EmptyKEntity.kt
+++ b/lib/src/main/java/com/github/wangyiqian/stockchart/entities/EmptyKEntity.kt
@@ -19,4 +19,4 @@ package com.github.wangyiqian.stockchart.entities
  * @author wangyiqian E-mail: wangyiqian9891@gmail.com
  * @version 创建时间: 2021/1/29
  */
-class EmptyKEntity : KEntity(0f, 0f, 0f, 0f, 0, 0)
\ No newline at end of file
+open class EmptyKEntity : KEntity(0f, 0f, 0f, 0f, 0, 0)
\ No newline at end of file