diff --git a/biome.json b/biome.json
new file mode 100644
index 0000000..9f5b1f4
--- /dev/null
+++ b/biome.json
@@ -0,0 +1,8 @@
+{
+    "linter": {
+      "enabled": true,
+      "rules": {
+        "default": true
+      }
+    }
+  }
\ No newline at end of file
diff --git a/src/api/networks.ts b/src/api/networks.ts
index d2ccad3..4a94233 100644
--- a/src/api/networks.ts
+++ b/src/api/networks.ts
@@ -3,41 +3,40 @@ import { UnimplementedNetwork } from '../error'
 /**
  * Network connection presets supported by Flashbots.
  */
-export class SupportedNetworks {
-    private static supportedNetworks = {
-        mainnet: {
-            name: "mainnet",
-            chainId: 1,
-            streamUrl: "https://mev-share.flashbots.net",
-            apiUrl: "https://relay.flashbots.net"
-        },
-        goerli: {
-            name: "goerli",
-            chainId: 5,
-            streamUrl: "https://mev-share-goerli.flashbots.net",
-            apiUrl: "https://relay-goerli.flashbots.net"
-        }
+const networks = {
+    mainnet: {
+        name: "mainnet",
+        chainId: 1,
+        streamUrl: "https://mev-share.flashbots.net",
+        apiUrl: "https://relay.flashbots.net",
+    },
+    sepolia: {
+        name: "sepolia",
+        chainId: 11155111,
+        streamUrl: "https://mev-share-sepolia.flashbots.net",
+        apiUrl: "https://relay-sepolia.flashbots.net",
+    },
+    holesky: {
+        name: "holesky",
+        chainId: 17000,
+        streamUrl: "https://mev-share-holesky.flashbots.net",
+        apiUrl: "https://relay-holesky.flashbots.net",
     }
+} as const
 
-    // expose networks individually as class properties
-    public static mainnet = this.supportedNetworks.mainnet
-    public static goerli = this.supportedNetworks.goerli
-
-    /**
-     * Returns true if the given chainId is supported by the client.
-     */
-    static supportsChainId(chainId: number) {
-        return Object.values(this.supportedNetworks).map(n => n.chainId).includes(chainId)
+/**
+ * Gets the network preset matching the provided chainId,
+ * throws an UnimplementedNetwork error if not found.
+ */
+function getNetwork (chainId: number) {
+    const net = Object.values(networks).find(net => net.chainId === chainId)
+    if (net) {
+        return net
     }
+    throw new UnimplementedNetwork({chainId})
+}
 
-    /** Gets the network preset matching the provided chainId, throws an error if not found. */
-    static getNetwork(chainId: number) {
-        if (this.supportsChainId(chainId)) {
-            const net = Object.values(this.supportedNetworks).find(net => net.chainId === chainId)
-            if (net) {
-                return net
-            }
-        }
-        throw new UnimplementedNetwork({chainId})
-    }
+export default {
+    ...networks,
+    getNetwork,
 }
diff --git a/src/client.ts b/src/client.ts
index 4a84a2d..436d1ae 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -2,7 +2,6 @@ import axios, { AxiosError } from "axios"
 import { Transaction, Wallet } from 'ethers'
 import EventSource from "eventsource"
 import { JsonRpcError, NetworkFailure, UnimplementedStreamEvent } from './error'
-
 import { getRpcRequest, JsonRpcData } from './flashbots';
 import {
     BundleParams,
@@ -24,7 +23,7 @@ import {
     EventHistoryEntry
 } from './api/interfaces'
 import { mungeBundleParams, mungePrivateTxParams, mungeSimBundleOptions } from "./api/mungers"
-import { SupportedNetworks } from './api/networks'
+import SupportedNetworks from './api/networks'
 import { PendingBundle, PendingTransaction } from './api/events';
 import { URLSearchParams } from 'url';
 
@@ -45,14 +44,19 @@ export default class MevShareClient {
         return new MevShareClient(authSigner, SupportedNetworks.mainnet)
     }
 
-    /** Connect to Flashbots MEV-Share node on Goerli. */
-    static useEthereumGoerli(authSigner: Wallet): MevShareClient {
-        return new MevShareClient(authSigner, SupportedNetworks.goerli)
+    /** Connect to Flashbots MEV-Share node on Sepolia. */
+    static useEthereumSepolia(authSigner: Wallet): MevShareClient {
+        return new MevShareClient(authSigner, SupportedNetworks.sepolia)
+    }
+
+    /** Connect to Flashbots MEV-Share node on Holesky. */
+    static useEthereumHolesky(authSigner: Wallet): MevShareClient {
+        return new MevShareClient(authSigner, SupportedNetworks.holesky)
     }
 
     /** Connect to supported networks by specifying a network with a `chainId`. */
     static fromNetwork(authSigner: Wallet, {chainId}: {chainId: number | bigint}): MevShareClient {
-        const chainNum = typeof chainId == "bigint" ? Number(chainId) : chainId
+        const chainNum = typeof chainId === "bigint" ? Number(chainId) : chainId
         const network = SupportedNetworks.getNetwork(chainNum)
         return new MevShareClient(authSigner, network)
     }
diff --git a/src/examples/lib/helpers.ts b/src/examples/lib/helpers.ts
index 3beefed..e2be1f7 100644
--- a/src/examples/lib/helpers.ts
+++ b/src/examples/lib/helpers.ts
@@ -1,11 +1,13 @@
-import { JsonRpcProvider, Network, Wallet } from 'ethers'
+import { JsonRpcProvider, Wallet } from 'ethers'
 import MevShareClient from '../..'
 import Env from './env'
+import networks from '../../api/networks'
 
 export function getProvider() {
-    return new JsonRpcProvider(Env.providerUrl, new Network("goerli", 5))
+    return new JsonRpcProvider(Env.providerUrl, networks.sepolia)
 }
 
+/** Initializes wallet and provider for examples, using Sepolia. */
 export async function initExample(provider: JsonRpcProvider) {
     const authSigner = new Wallet(Env.authKey).connect(provider)
 
@@ -13,7 +15,7 @@ export async function initExample(provider: JsonRpcProvider) {
         provider,
         wallet: new Wallet(Env.senderKey).connect(provider),
         authSigner,
-        mevshare: MevShareClient.useEthereumGoerli(authSigner),
+        mevshare: MevShareClient.useEthereumSepolia(authSigner),
         feeData: await provider.getFeeData(),
     }
 }
diff --git a/src/index.ts b/src/index.ts
index effa8eb..2bb3d4e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,4 @@
+import SupportedNetworks from './api/networks'
 import MevShareClient from './client'
 
 export {
@@ -11,6 +12,6 @@ export {
     EventHistoryEntry,
 } from "./api/interfaces"
 
-export {SupportedNetworks} from "./api/networks"
+export {SupportedNetworks}
 
 export default MevShareClient