diff --git a/src/hooks/DAO/loaders/useFractalFreeze.ts b/src/hooks/DAO/loaders/useFractalFreeze.ts
index 40a92b46e7..16ce49105b 100644
--- a/src/hooks/DAO/loaders/useFractalFreeze.ts
+++ b/src/hooks/DAO/loaders/useFractalFreeze.ts
@@ -5,8 +5,8 @@ import {
 } from '@fractal-framework/fractal-contracts';
 import { TypedListener } from '@fractal-framework/fractal-contracts/dist/typechain-types/common';
 import { FreezeVoteCastEvent } from '@fractal-framework/fractal-contracts/dist/typechain-types/contracts/ERC20FreezeVoting';
-import { constants } from 'ethers';
 import { useCallback, useEffect, useRef } from 'react';
+import { zeroAddress } from 'viem';
 import { useAccount } from 'wagmi';
 import {
   isWithinFreezeProposalPeriod,
@@ -80,7 +80,7 @@ export const useFractalFreeze = ({
       const freezePeriod = await blocksToSeconds(freezePeriodBlock, provider);
 
       const userHasFreezeVoted = await freezeVotingContract.userHasFreezeVoted(
-        account || constants.AddressZero,
+        account || zeroAddress,
         freezeCreatedBlock,
       );
       const isFrozen = await freezeVotingContract.isFrozen();
diff --git a/src/hooks/DAO/loaders/useFractalGuardContracts.ts b/src/hooks/DAO/loaders/useFractalGuardContracts.ts
index 520e9f186c..e023ae95dd 100644
--- a/src/hooks/DAO/loaders/useFractalGuardContracts.ts
+++ b/src/hooks/DAO/loaders/useFractalGuardContracts.ts
@@ -1,6 +1,6 @@
 import { AzoriusFreezeGuard, MultisigFreezeGuard } from '@fractal-framework/fractal-contracts';
-import { constants } from 'ethers';
 import { useCallback, useEffect, useRef } from 'react';
+import { zeroAddress } from 'viem';
 import { useFractal } from '../../../providers/App/AppProvider';
 import { GuardContractAction } from '../../../providers/App/guardContracts/action';
 import { useNetworkConfig } from '../../../providers/NetworkConfig/NetworkConfigProvider';
@@ -51,7 +51,7 @@ export const useFractalGuardContracts = ({ loadOnMount = true }: { loadOnMount?:
       if (!!azoriusModule && azoriusModule.moduleContract) {
         const azoriusGuardAddress = await azoriusModule.moduleContract.getGuard();
 
-        if (azoriusGuardAddress === constants.AddressZero) {
+        if (azoriusGuardAddress === zeroAddress) {
           return {
             freezeGuardContractAddress: '',
             freezeVotingContractAddress: '',
@@ -66,7 +66,7 @@ export const useFractalGuardContracts = ({ loadOnMount = true }: { loadOnMount?:
         };
         freezeGuardType = FreezeGuardType.AZORIUS;
       } else {
-        const hasNoGuard = _safe.guard === constants.AddressZero;
+        const hasNoGuard = _safe.guard === zeroAddress;
         const masterCopyData = await getZodiacModuleProxyMasterCopyData(guard!);
         if (masterCopyData.isMultisigFreezeGuard && !hasNoGuard) {
           freezeGuardContract = {
diff --git a/src/hooks/utils/useMasterCopy.ts b/src/hooks/utils/useMasterCopy.ts
index 8bb49a6926..89598241dc 100644
--- a/src/hooks/utils/useMasterCopy.ts
+++ b/src/hooks/utils/useMasterCopy.ts
@@ -1,6 +1,7 @@
 import { ModuleProxyFactory } from '@fractal-framework/fractal-contracts';
-import { Contract, constants } from 'ethers';
+import { Contract } from 'ethers';
 import { useCallback } from 'react';
+import { zeroAddress } from 'viem';
 import { getEventRPC } from '../../helpers';
 import { useFractal } from '../../providers/App/AppProvider';
 import { CacheExpiry, CacheKeys } from './cache/cacheDefaults';
@@ -59,12 +60,8 @@ export function useMasterCopy() {
       return contract.queryFilter(filter).then(proxiesCreated => {
         // @dev to prevent redundant queries, cache the master copy address as AddressZero if no proxies were created
         if (proxiesCreated.length === 0) {
-          setValue(
-            CacheKeys.MASTER_COPY_PREFIX + proxyAddress,
-            constants.AddressZero,
-            CacheExpiry.ONE_WEEK,
-          );
-          return [constants.AddressZero, 'No proxies created'] as const;
+          setValue(CacheKeys.MASTER_COPY_PREFIX + proxyAddress, zeroAddress, CacheExpiry.ONE_WEEK);
+          return [zeroAddress, 'No proxies created'] as const;
         }
         const masterCopyAddress = proxiesCreated[0].args!.masterCopy;
         setValue(CacheKeys.MASTER_COPY_PREFIX + proxyAddress, masterCopyAddress);
diff --git a/src/utils/api.spec.ts b/src/utils/api.spec.ts
index 67537c7929..d16c7f5a61 100644
--- a/src/utils/api.spec.ts
+++ b/src/utils/api.spec.ts
@@ -1,4 +1,4 @@
-import { constants } from 'ethers';
+import { zeroAddress } from 'viem';
 import { buildSafeApiUrl } from './api';
 
 describe('Safe URL builder tests', () => {
@@ -16,11 +16,11 @@ describe('Safe URL builder tests', () => {
   test('Creates Safe Transaction Service URL, with params', async () => {
     const safeTransactionURL = buildSafeApiUrl(
       'https://safe-transaction-sepolia.safe.global',
-      `/safes/${constants.AddressZero}/multisig-transactions`,
-      { target: constants.AddressZero },
+      `/safes/${zeroAddress}/multisig-transactions`,
+      { target: zeroAddress },
       'v1',
     );
-    const EXPECTED_URL = `https://safe-transaction-sepolia.safe.global/api/v1/safes/${constants.AddressZero}/multisig-transactions?target=${constants.AddressZero}`;
+    const EXPECTED_URL = `https://safe-transaction-sepolia.safe.global/api/v1/safes/${zeroAddress}/multisig-transactions?target=${zeroAddress}`;
     expect(safeTransactionURL).toEqual(EXPECTED_URL);
   });
 });