diff --git a/src/lib/types/api/collection.ts b/src/lib/types/api/collection.ts
index 8772e074..d5a28daa 100644
--- a/src/lib/types/api/collection.ts
+++ b/src/lib/types/api/collection.ts
@@ -164,6 +164,7 @@ export interface CollectionFilters {
 	race?: number[]
 	proficiency?: number[]
 	gender?: number[]
+	series?: (string | number)[]
 	sort?: CollectionSortKey
 	page?: number
 	limit?: number