diff --git a/src/factories/NFTFactory.ts b/src/factories/NFTFactory.ts
index 1458b1d7..9d9365e6 100644
--- a/src/factories/NFTFactory.ts
+++ b/src/factories/NFTFactory.ts
@@ -867,6 +867,9 @@ export class NftFactory {
   ): Promise<TransactionReceipt> {
     const ercCreateData = getErcCreationParams(ercParams)
 
+    dispenserParams.maxBalance = Web3.utils.toWei(dispenserParams.maxBalance)
+    dispenserParams.maxTokens = Web3.utils.toWei(dispenserParams.maxTokens)
+
     const estGas = await this.estGasCreateNftErc20WithDispenser(
       address,
       nftCreateData,
diff --git a/test/integration/PublishFlows.test.ts b/test/integration/PublishFlows.test.ts
index dcfb42a4..e122c935 100644
--- a/test/integration/PublishFlows.test.ts
+++ b/test/integration/PublishFlows.test.ts
@@ -262,8 +262,8 @@ describe('Publish tests', async () => {
 
     const dispenserParams: DispenserCreationParams = {
       dispenserAddress: addresses.Dispenser,
-      maxTokens: web3.utils.toWei('1'),
-      maxBalance: web3.utils.toWei('1'),
+      maxTokens: '1',
+      maxBalance: '1',
       withMint: true,
       allowedSwapper: ZERO_ADDRESS
     }
diff --git a/test/unit/NftFactory.test.ts b/test/unit/NftFactory.test.ts
index eb24cf10..ccef3c9b 100644
--- a/test/unit/NftFactory.test.ts
+++ b/test/unit/NftFactory.test.ts
@@ -254,8 +254,8 @@ describe('Nft Factory test', () => {
 
     const dispenserParams = {
       dispenserAddress: contracts.dispenserAddress,
-      maxTokens: web3.utils.toWei('1'),
-      maxBalance: web3.utils.toWei('1'),
+      maxTokens: '1',
+      maxBalance: '1',
       withMint: true,
       allowedSwapper: ZERO_ADDRESS
     }