diff --git a/src/storage/indexed-db/merkletree.ts b/src/storage/indexed-db/merkletree.ts
index 381d95ca..e991a301 100644
--- a/src/storage/indexed-db/merkletree.ts
+++ b/src/storage/indexed-db/merkletree.ts
@@ -1,4 +1,4 @@
-import { createStore, UseStore, get, set, del } from 'idb-keyval';
+import { createStore, UseStore, get, set } from 'idb-keyval';
 import { IndexedDBStorage, Merkletree, str2Bytes } from '@iden3/js-merkletree';
 import { IdentityMerkleTreeMetaInformation, MerkleTreeType } from '../entities/mt';
 import * as uuid from 'uuid';