diff --git a/src/config/index.ts b/src/config/index.ts
index 01fcbe4ce8..219cc1efd5 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -4,6 +4,7 @@ import {
   GAS_PRICE_TYPE,
   RPC_AUTHENTICATION,
   RpcUri,
+  GasPriceFixed,
 } from '@gnosis.pm/safe-react-gateway-sdk'
 import { CONFIG_REDUCER_ID, initialConfigState } from 'src/logic/config/store/reducer'
 
@@ -89,6 +90,13 @@ export const getGasPriceOracles = (): Extract<ChainInfo['gasPrice'][number], Gas
   return getChainInfo().gasPrice.filter(isOracleType)
 }
 
+export const getFixedGasPrice = (): Extract<ChainInfo['gasPrice'][number], GasPriceFixed> => {
+  const isFixed = (gasPrice: ChainInfo['gasPrice'][number]): gasPrice is GasPriceFixed => {
+    return gasPrice.type === GAS_PRICE_TYPE.FIXED
+  }
+  return getChainInfo().gasPrice.filter(isFixed)[0]
+}
+
 export const getTxServiceUrl = (): ChainInfo['transactionService'] => {
   const { transactionService } = getChainInfo()
   // To avoid breaking changes, we define the version the web uses manually
diff --git a/src/logic/safe/utils/safeVersion.ts b/src/logic/safe/utils/safeVersion.ts
index bb4c83103a..25725b7001 100644
--- a/src/logic/safe/utils/safeVersion.ts
+++ b/src/logic/safe/utils/safeVersion.ts
@@ -10,7 +10,6 @@ import { Errors, logError } from 'src/logic/exceptions/CodedException'
 import { getChainInfo } from 'src/config'
 
 const FEATURES_BY_VERSION: Record<string, string> = {
-  [FEATURES.ERC1155]: '>=1.1.1',
   [FEATURES.SAFE_TX_GAS_OPTIONAL]: '>=1.3.0',
 }
 
diff --git a/src/logic/wallets/ethTransactions.ts b/src/logic/wallets/ethTransactions.ts
index 2e40097fec..8d02a015a9 100644
--- a/src/logic/wallets/ethTransactions.ts
+++ b/src/logic/wallets/ethTransactions.ts
@@ -3,7 +3,7 @@ import { BigNumber } from 'bignumber.js'
 import { EthAdapterTransaction } from '@gnosis.pm/safe-core-sdk/dist/src/ethereumLibs/EthAdapter'
 
 import { getSDKWeb3ReadOnly, getWeb3, getWeb3ReadOnly } from 'src/logic/wallets/getWeb3'
-import { getGasPriceOracles } from 'src/config'
+import { getFixedGasPrice, getGasPriceOracles } from 'src/config'
 import { CodedException, Errors } from '../exceptions/CodedException'
 import { GasPriceOracle } from '@gnosis.pm/safe-react-gateway-sdk'
 
@@ -33,6 +33,12 @@ export const calculateGasPrice = async (): Promise<string> => {
     }
   }
 
+  // A fallback to fixed gas price from the chain config
+  const fixedGasPrice = getFixedGasPrice()
+  if (fixedGasPrice) {
+    return fixedGasPrice.weiValue
+  }
+
   // A fallback based on the latest mined blocks when none of the oracles are working
   const web3ReadOnly = getWeb3ReadOnly()
   const fixedFee = web3ReadOnly.utils.toWei(FIXED_GAS_FEE, 'gwei')
diff --git a/src/utils/constants.ts b/src/utils/constants.ts
index 5328f93911..2c34523a17 100644
--- a/src/utils/constants.ts
+++ b/src/utils/constants.ts
@@ -33,9 +33,10 @@ export const CONFIG_SERVICE_URL =
   process.env.CONFIG_SERVICE_URL || IS_PRODUCTION
     ? 'https://safe-config.gnosis.io/api/v1'
     : 'https://safe-config.staging.gnosisdev.com/api/v1'
-export const GATEWAY_URL = IS_PRODUCTION
-  ? 'https://safe-client.gnosis.io/v1'
-  : 'https://safe-client.staging.gnosisdev.com/v1'
+export const GATEWAY_URL =
+  IS_PRODUCTION || window.location.hash === '#prod'
+    ? 'https://safe-client.gnosis.io/v1'
+    : 'https://safe-client.staging.gnosisdev.com/v1'
 export const IPFS_GATEWAY = process.env.REACT_APP_IPFS_GATEWAY
 export const SPENDING_LIMIT_MODULE_ADDRESS =
   process.env.REACT_APP_SPENDING_LIMIT_MODULE_ADDRESS || '0xCFbFaC74C26F8647cBDb8c5caf80BB5b32E43134'