diff --git a/src/types/recommendations.d.ts b/src/types/recommendations.d.ts
index 9e0cd33c..0b63f41b 100644
--- a/src/types/recommendations.d.ts
+++ b/src/types/recommendations.d.ts
@@ -40,7 +40,7 @@ export interface RecommendationsResponse extends Record<string, any> {
 
 export interface RecommendationsRequestType extends Record<string, any> {
   num_results: number;
-  item_id: string;
+  item_id: string | string[];
   filters: {
     group_id: string;
     [key: string]: any;