diff --git a/src/v2/api/index.md b/src/v2/api/index.md
index eaf6b9999a..faac11ba71 100644
--- a/src/v2/api/index.md
+++ b/src/v2/api/index.md
@@ -1430,6 +1430,8 @@ type: api
 
 ### vm.$attrs
 
+> New in 2.4.0+
+
 - **Type:** `{ [key: string]: string }`
 
 - **Read only**
@@ -1440,6 +1442,8 @@ type: api
 
 ### vm.$listeners
 
+> New in 2.4.0+
+
 - **Type:** `{ [key: string]: Function | Array<Function> }`
 
 - **Read only**