diff --git a/docs/README.md b/docs/README.md
index e2673d8..975d3c2 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -25,7 +25,7 @@ npm install @qubic-js/browser
 ```javascript
 enum Network {
   MAINNET,
-  GOERLI,
+  HOLESKY,
   POLYGON,
   MUMBAI,
   BSC,
diff --git a/example/src/App.tsx b/example/src/App.tsx
index cf9ac11..482fb3a 100644
--- a/example/src/App.tsx
+++ b/example/src/App.tsx
@@ -14,9 +14,9 @@ import { compareAddressAndLog } from './utils';
 
 const qubicWalletConnector = wrappedConnectors.qubic[0] as QubicWalletConnector;
 
-// https://goerli.etherscan.io/address/0x022E292b44B5a146F2e8ee36Ff44D3dd863C915c
-const ERC_20_EXAMPLE_CONTRACT_ADDRESS = '0x022E292b44B5a146F2e8ee36Ff44D3dd863C915c';
-const ERC_20_EXAMPLE_CHAIN_ID = 5;
+// https://holesky.etherscan.io/address/0xe20c80EEf6911888D2A13FB181B476cd5E47f6B3
+const ERC_20_EXAMPLE_CONTRACT_ADDRESS = '0xe20c80EEf6911888D2A13FB181B476cd5E47f6B3';
+const ERC_20_EXAMPLE_CHAIN_ID = 17000;
 const ERC_20_EXAMPLE_EXPLORER_TX = NETWORK_INFO[ERC_20_EXAMPLE_CHAIN_ID].explorerUrl + '/tx';
 
 // These are from dev/stag/prod creator contract
@@ -537,11 +537,10 @@ function App() {
     [address, network, web3Provider],
   );
 
-  // TODO: should update contractAddress when new contract deploy
-  const handleGoerliMint = useCallback(async () => {
+  const handleHoleskyMint = useCallback(async () => {
     handleNftMint({
-      targetNetwork: Network.GOERLI,
-      contractAddress: '0x5BF70eA03D7747f574A30227599AE26Bc6Be5C00',
+      targetNetwork: Network.HOLESKY,
+      contractAddress: '0x3978aaae125cba044d1d2864a68bf4e77720adbf',
     });
   }, [handleNftMint]);
 
@@ -634,7 +633,7 @@ function App() {
 
         <Group>
           <Title>Smart Contract</Title>
-          <Button onClick={handleGoerliMint}>Mint - goerli</Button>
+          <Button onClick={handleHoleskyMint}>Mint - holesky</Button>
           <Button onClick={handleBscTestnetMint}>Mint - bsc testnet</Button>
           <Button onClick={handleTransfer721}>Transfer721</Button>
         </Group>
diff --git a/packages/core/src/constants/backend.ts b/packages/core/src/constants/backend.ts
index 05e7577..5dd4ff8 100644
--- a/packages/core/src/constants/backend.ts
+++ b/packages/core/src/constants/backend.ts
@@ -5,7 +5,7 @@ export const WALLET_URL = 'https://wallet.qubic.app';
 // https://infura.io/docs/ethereum#section/Choose-a-Network
 export const INFURA_NETWORK_ENDPOINTS: Record<Network, string> = {
   [Network.MAINNET]: 'mainnet',
-  [Network.GOERLI]: 'goerli',
+  [Network.HOLESKY]: 'holesky',
   [Network.POLYGON]: 'polygon-mainnet',
   [Network.MUMBAI]: 'polygon-mumbai',
   // [Network.OPTIMISTIC]: 'optimism-mainnet',
diff --git a/packages/core/src/constants/network.ts b/packages/core/src/constants/network.ts
index f777003..fcacc3f 100644
--- a/packages/core/src/constants/network.ts
+++ b/packages/core/src/constants/network.ts
@@ -32,11 +32,12 @@ export const NETWORK_INFO: Record<Network, NetworkInfo> = {
     networkType: 'ethereum',
   },
 
-  [Network.GOERLI]: {
-    name: 'goerli',
-    chainId: Network.GOERLI,
-    ensAddress: '0x112234455c3a32fd11230c42e7bccd4a84e02010',
-    explorerUrl: 'https://goerli.etherscan.io',
+  [Network.HOLESKY]: {
+    name: 'holesky',
+    chainId: Network.HOLESKY,
+    // ens currently does not support holesky
+    ensAddress: '0x0000000000000000000000000000000000000000',
+    explorerUrl: 'https://holesky.etherscan.io',
     color: '#f6c343',
     nativeToken: ETHEREUM_NATIVE_TOKEN,
     networkType: 'ethereum',
diff --git a/packages/core/src/middlewares/multiJsonRpcServerMiddleware.ts b/packages/core/src/middlewares/multiJsonRpcServerMiddleware.ts
index 62497da..1066f6a 100644
--- a/packages/core/src/middlewares/multiJsonRpcServerMiddleware.ts
+++ b/packages/core/src/middlewares/multiJsonRpcServerMiddleware.ts
@@ -14,6 +14,9 @@ interface MultiInfuraMiddlewareOptions {
 const BSC_RPC_URL = 'https://bsc-dataseed1.binance.org';
 const BSC_TESTNET_RPC_URL = 'https://data-seed-prebsc-1-s1.binance.org:8545';
 
+// infura doesn't support holesky, so we use json rpc server here
+const HOLESKY_RPC_URL = 'https://1rpc.io/holesky';
+
 export const createMultiInfuraMiddleware = (
   options: MultiInfuraMiddlewareOptions,
   bridge: Bridge,
@@ -22,18 +25,42 @@ export const createMultiInfuraMiddleware = (
   const infuraMiddlewares = new Map<Network, JsonRpcMiddleware<unknown, unknown>>();
 
   function getCurrentMiddleware(): JsonRpcMiddleware<unknown, unknown> {
-    const currentMiddleware =
-      infuraMiddlewares.get(currentNetwork) ||
-      ([Network.BSC, Network.BSC_TESTNET].includes(currentNetwork)
-        ? createJsonRpcServerMiddleware({
-            url: currentNetwork === Network.BSC ? BSC_RPC_URL : BSC_TESTNET_RPC_URL,
-          })
-        : createInfuraMiddleware({
-            network: INFURA_NETWORK_ENDPOINTS[currentNetwork],
-            projectId: options.projectId,
-          }));
-
-    infuraMiddlewares.set(currentNetwork, currentMiddleware);
+    const existMiddleWare = infuraMiddlewares.get(currentNetwork);
+    if (existMiddleWare) {
+      return existMiddleWare;
+    }
+
+    let currentMiddleware;
+
+    switch (currentNetwork) {
+      case Network.BSC:
+        currentMiddleware = createJsonRpcServerMiddleware({
+          url: BSC_RPC_URL,
+        });
+
+        break;
+      case Network.BSC_TESTNET:
+        currentMiddleware = createJsonRpcServerMiddleware({
+          url: BSC_TESTNET_RPC_URL,
+        });
+
+        break;
+      case Network.HOLESKY:
+        currentMiddleware = createJsonRpcServerMiddleware({
+          url: HOLESKY_RPC_URL,
+        });
+
+        break;
+      default:
+        currentMiddleware = createInfuraMiddleware({
+          network: INFURA_NETWORK_ENDPOINTS[currentNetwork],
+          projectId: options.projectId,
+        });
+
+        break;
+    }
+
+    infuraMiddlewares.set(currentNetwork, currentMiddleware as JsonRpcMiddleware<unknown, unknown>);
 
     return currentMiddleware;
   }
diff --git a/packages/core/src/types/chain.ts b/packages/core/src/types/chain.ts
index 3fc3a13..c766d1e 100644
--- a/packages/core/src/types/chain.ts
+++ b/packages/core/src/types/chain.ts
@@ -1,6 +1,6 @@
 export enum Network {
   MAINNET = 1,
-  GOERLI = 5,
+  HOLESKY = 17000,
   POLYGON = 137,
   MUMBAI = 80001,
   // OPTIMISTIC = 10,
@@ -16,10 +16,10 @@ export interface Token {
 }
 
 export const ALL_NETWORKS_TYPES = ['ethereum', 'polygon', 'bsc'] as const;
-export type NetworkType = typeof ALL_NETWORKS_TYPES[number];
+export type NetworkType = (typeof ALL_NETWORKS_TYPES)[number];
 
 export interface NetworkInfo {
-  name: 'mainnet' | 'goerli' | 'polygon' | 'mumbai' | 'bsc' | 'bscTestnet';
+  name: 'mainnet' | 'holesky' | 'polygon' | 'mumbai' | 'bsc' | 'bscTestnet';
   chainId: Network;
   ensAddress: string;
   explorerUrl: string; // no last `/`
diff --git a/packages/react/src/connector/QubicConnector.ts b/packages/react/src/connector/QubicConnector.ts
index c9dd6af..2f2c166 100644
--- a/packages/react/src/connector/QubicConnector.ts
+++ b/packages/react/src/connector/QubicConnector.ts
@@ -37,7 +37,7 @@ export default class QubicWalletConnector extends Connector {
   private eagerConnection?: Promise<void>;
   private supportedChainIds = [
     Network.MAINNET,
-    Network.GOERLI,
+    Network.HOLESKY,
     Network.POLYGON,
     Network.MUMBAI,
     Network.BSC,