diff --git a/packages/incremental-merkle-tree.sol/contracts/package.json b/packages/incremental-merkle-tree.sol/contracts/package.json
index e7bf6e2..133e494 100644
--- a/packages/incremental-merkle-tree.sol/contracts/package.json
+++ b/packages/incremental-merkle-tree.sol/contracts/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@zk-kit/incremental-merkle-tree.sol",
-    "version": "1.3.3",
+    "version": "1.4.0",
     "description": "Incremental Merkle tree Solidity libraries.",
     "license": "MIT",
     "files": [