diff --git a/types/venn/index.d.ts b/types/venn/index.d.ts
index 68054206d3..a71fa2edc0 100644
--- a/types/venn/index.d.ts
+++ b/types/venn/index.d.ts
@@ -19,8 +19,9 @@ export interface Circle {
   radius: number;
 }
 
+/** Typing for Overlap object. */
 export interface Overlap {
-  sets: number[];
+  sets: string[];
   size: number;
   weight?: number;
 }