diff --git a/contracts/MerkleTreeWithHistory.sol b/contracts/MerkleTreeWithHistory.sol
index 5f5647b..f264cd0 100644
--- a/contracts/MerkleTreeWithHistory.sol
+++ b/contracts/MerkleTreeWithHistory.sol
@@ -17,7 +17,7 @@ library Hasher {
 
 contract MerkleTreeWithHistory {
   uint256 public constant FIELD_SIZE = 21888242871839275222246405745257275088548364400416034343698204186575808495617;
-  uint256 public constant ZERO_VALUE = 5702960885942360421128284892092891246826997279710054143430547229469817701242; // = MiMC("tornado")
+  uint256 public constant ZERO_VALUE = 21663839004416932945382355908790599225266501822907911457504978515578255421292; // = keccak256("tornado") % FIELD_SIZE
 
   uint32 public levels;
 
diff --git a/lib/MerkleTree.js b/lib/MerkleTree.js
index 958b809..af26b6d 100644
--- a/lib/MerkleTree.js
+++ b/lib/MerkleTree.js
@@ -11,7 +11,7 @@ class MerkleTree {
     this.zero_values = []
     this.totalElements = 0
 
-    let current_zero_value = '5702960885942360421128284892092891246826997279710054143430547229469817701242'
+    let current_zero_value = '21663839004416932945382355908790599225266501822907911457504978515578255421292'
     this.zero_values.push(current_zero_value)
     for (let i = 0; i < n_levels; i++) {
       current_zero_value = this.hasher.hash(i, current_zero_value, current_zero_value)