diff --git a/types/postman-collection/index.d.ts b/types/postman-collection/index.d.ts
index 7a05c39128..0b32209b4f 100644
--- a/types/postman-collection/index.d.ts
+++ b/types/postman-collection/index.d.ts
@@ -154,7 +154,7 @@ export interface ItemGroupDefinition extends PropertyDefinition {
 
 export class ItemGroup<TItem> extends Property<ItemGroupDefinition> {
     auth?: RequestAuth;
-    items: PropertyList<TItem>;
+    items: PropertyList<TItem | ItemGroup<TItem>>;
     events: EventList;
 
     constructor(definition?: ItemGroupDefinition);
diff --git a/types/postman-collection/postman-collection-tests.ts b/types/postman-collection/postman-collection-tests.ts
index d203ed68f0..6b00083e74 100644
--- a/types/postman-collection/postman-collection-tests.ts
+++ b/types/postman-collection/postman-collection-tests.ts
@@ -137,7 +137,7 @@ igDef.event; // $ExpectType EventDefinition[] | undefined
 // ItemGroup Tests
 const ig = new pmCollection.ItemGroup<pmCollection.Certificate>();
 ig.auth; // $ExpectType RequestAuth | undefined
-ig.items; // $ExpectType PropertyList<Certificate>
+ig.items; // $ExpectType PropertyList<Certificate | ItemGroup<Certificate>>
 ig.events; // $ExpectType EventList
 
 ig.authorizeRequestsUsing("string"); // $ExpectType void