diff --git a/packages/neuron-ui/src/components/Addresses/index.tsx b/packages/neuron-ui/src/components/Addresses/index.tsx
index 2ef12764cb..0afdffb770 100644
--- a/packages/neuron-ui/src/components/Addresses/index.tsx
+++ b/packages/neuron-ui/src/components/Addresses/index.tsx
@@ -20,6 +20,7 @@ import { StateWithDispatch } from 'states/stateProvider/reducer'
 import { useLocalDescription } from 'utils/hooks'
 import { localNumberFormatter, shannonToCKBFormatter } from 'utils/formatters'
 import { onRenderRow } from 'utils/fabricUIRender'
+import { MAINNET_TAG } from 'utils/const'
 
 const Addresses = ({
   app: {
@@ -30,8 +31,7 @@ const Addresses = ({
   settings: { networks = [] },
   dispatch,
 }: React.PropsWithoutRef<StateWithDispatch & RouteComponentProps>) => {
-  const isMainnet =
-    (networks.find(n => n.id === networkID) || {}).chain === (process.env.REACT_APP_MAINNET_TAG || 'ckb')
+  const isMainnet = (networks.find(n => n.id === networkID) || {}).chain === MAINNET_TAG
   const [showMainnetAddress, setShowMainnetAddress] = useState(false)
   const [t] = useTranslation()
 
diff --git a/packages/neuron-ui/src/components/Transaction/index.tsx b/packages/neuron-ui/src/components/Transaction/index.tsx
index 54b83c0b54..7e8287d8a0 100644
--- a/packages/neuron-ui/src/components/Transaction/index.tsx
+++ b/packages/neuron-ui/src/components/Transaction/index.tsx
@@ -8,7 +8,7 @@ import { ckbCore } from 'services/chain'
 import { transactionState } from 'states/initStates/chain'
 
 import { localNumberFormatter, uniformTimeFormatter, shannonToCKBFormatter } from 'utils/formatters'
-import { ErrorCode } from 'utils/const'
+import { ErrorCode, MAINNET_TAG } from 'utils/const'
 import { explorerNavButton } from './style.module.scss'
 
 const MIN_CELL_WIDTH = 70
@@ -199,9 +199,7 @@ const Transaction = () => {
           }
 
           setAddressPrefix(
-            network.chain === process.env.REACT_APP_MAINNET_TAG
-              ? ckbCore.utils.AddressPrefix.Mainnet
-              : ckbCore.utils.AddressPrefix.Testnet
+            network.chain === MAINNET_TAG ? ckbCore.utils.AddressPrefix.Mainnet : ckbCore.utils.AddressPrefix.Testnet
           )
         }
       })
diff --git a/packages/neuron-ui/src/utils/const.ts b/packages/neuron-ui/src/utils/const.ts
index 135ae4ab4f..f6d812a7d7 100644
--- a/packages/neuron-ui/src/utils/const.ts
+++ b/packages/neuron-ui/src/utils/const.ts
@@ -10,6 +10,7 @@ export const UNREMOVABLE_NETWORK_ID = '0'
 export const CONFIRMATION_THRESHOLD = 30
 
 export const MAX_DECIMAL_DIGITS = 8
+export const MAINNET_TAG = 'ckb'
 
 export enum ConnectionStatus {
   Online = 'online',