diff --git a/circuits/merkleTree.circom b/circuits/merkleTree.circom
index 212f0e5..4e5fe06 100644
--- a/circuits/merkleTree.circom
+++ b/circuits/merkleTree.circom
@@ -7,7 +7,7 @@ template HashLeftRight(rounds) {
 
     signal output hash;
 
-    component hasher = Poseidon(2, 6, 8, 57);
+    component hasher = Poseidon(2, 3, 8, 57);
     hasher.inputs[0] <== left;
     hasher.inputs[1] <== right;
 
diff --git a/lib/Poseidon.js b/lib/Poseidon.js
index 1840149..1279472 100644
--- a/lib/Poseidon.js
+++ b/lib/Poseidon.js
@@ -5,7 +5,7 @@ const bigInt = snarkjs.bigInt
 
 class PoseidonHasher {
   hash(level, left, right) {
-    const hash = poseidon.createHash(6, 8, 57)
+    const hash = poseidon.createHash(3, 8, 57)
     return hash([bigInt(left), bigInt(right)]).toString()
   }
 }
diff --git a/migrations/2_deploy_hasher.js b/migrations/2_deploy_hasher.js
index 000845c..2fa50b4 100644
--- a/migrations/2_deploy_hasher.js
+++ b/migrations/2_deploy_hasher.js
@@ -12,7 +12,7 @@ module.exports = function(deployer) {
     await artifactor.save({
       contractName,
       abi: genContract.abi,
-      unlinked_binary: genContract.createCode(),
+      unlinked_binary: genContract.createCode(3),
     }).then(async () => {
       const hasherContract = artifacts.require(contractName)
       await deployer.deploy(hasherContract)