diff --git a/index.d.ts b/index.d.ts
index c1a2ce31..57999b6a 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -141,6 +141,12 @@ export interface ReactJsonViewProps {
    * Default: null
    */
   defaultValue?: TypeDefaultValue | TypeDefaultValue[] | null;
+  /**
+   * When set to true, the index of the elements prefix values
+   *
+   * Default: true
+   */
+  displayArrayKey?: boolean
 }
 
 export interface OnCopyProps {