diff --git a/src/lib/types.ts b/src/lib/types.ts
index 87a9f53..673e8e1 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -74,6 +74,7 @@ export type SearchParams = {
   boost?: { [key: string]: number }
   exact?: boolean
   threshold?: number
+  similarity?: number
   tolerance?: number
   userID?: string
   groupBy?: { properties: string[]; max_results?: number }