diff --git a/backend/src/models/secretBlindIndexData.ts b/backend/src/models/secretBlindIndexData.ts
index 5d0cd976a..da397d2c1 100644
--- a/backend/src/models/secretBlindIndexData.ts
+++ b/backend/src/models/secretBlindIndexData.ts
@@ -1,5 +1,5 @@
 import { Document, Schema, Types, model } from "mongoose";
-import { 
+import {
     ALGORITHM_AES_256_GCM,
     ENCODING_SCHEME_BASE64,
     ENCODING_SCHEME_UTF8,
@@ -53,4 +53,6 @@ const secretBlindIndexDataSchema = new Schema<ISecretBlindIndexData>(
     }
 );
 
+secretBlindIndexDataSchema.index({ workspace: 1 });
+
 export const SecretBlindIndexData = model<ISecretBlindIndexData>("SecretBlindIndexData", secretBlindIndexDataSchema);
\ No newline at end of file