diff --git a/src/types/index.d.ts b/src/types/index.d.ts
index 67ceab2383b..d462f360017 100644
--- a/src/types/index.d.ts
+++ b/src/types/index.d.ts
@@ -2817,6 +2817,7 @@ export interface BorderOptions {
   dashOffset: Scriptable<number, ScriptableScaleContext>;
   color: Color;
   width: number;
+  z: number;
 }
 
 export interface GridLineOptions {