diff --git a/packages/constants/README.md b/packages/constants/README.md
index e285ad6..f4c0111 100644
--- a/packages/constants/README.md
+++ b/packages/constants/README.md
@@ -31,7 +31,7 @@ yarn add @lido-sdk/constants
 ```ts
 import { CHAINS } from '@lido-sdk/constants';
 
-console.log(CHAINS.Mainnet, CHAINS.Goerli); // 1, 5
+console.log(CHAINS.Mainnet, CHAINS.Holesky); // 1, 17000
 ```
 
 ### Array of chains ids
diff --git a/packages/constants/src/chains.ts b/packages/constants/src/chains.ts
index 53a1417..9f4d490 100644
--- a/packages/constants/src/chains.ts
+++ b/packages/constants/src/chains.ts
@@ -2,12 +2,13 @@ import invariant from 'tiny-invariant';
 
 export enum CHAINS {
   Mainnet = 1,
-  Ropsten = 3,
-  Rinkeby = 4,
-  Goerli = 5,
-  Kovan = 42,
-  Kintsugi = 1337702,
-  Kiln = 1337802,
+  Ropsten = 3, // decommissioned
+  Rinkeby = 4, // decommissioned
+  Goerli = 5, // deprecated
+  Kovan = 42, // decommissioned
+  Kintsugi = 1337702, // decommissioned
+  Kiln = 1337802, // decommissioned
+  Holesky = 17000,
   Moonbeam = 1284,
   Moonriver = 1285,
   Moonbase = 1287,
diff --git a/packages/constants/src/tokens.ts b/packages/constants/src/tokens.ts
index 351a6c5..3807e86 100644
--- a/packages/constants/src/tokens.ts
+++ b/packages/constants/src/tokens.ts
@@ -28,6 +28,11 @@ export const TOKENS_BY_NETWORK: {
     [TOKENS.STETH]: '0x1643e812ae58766192cf7d2cf9567df2c37e9b7f',
     [TOKENS.LDO]: '0x56340274fB5a72af1A3C6609061c451De7961Bd4',
   },
+  [CHAINS.Holesky]: {
+    [TOKENS.WSTETH]: '0x8d09a4502Cc8Cf1547aD300E066060D043f6982D',
+    [TOKENS.STETH]: '0x3F1c547b21f65e10480dE3ad8E19fAAC46C95034',
+    [TOKENS.LDO]: '0x14ae7daeecdf57034f3E9db8564e46Dba8D97344',
+  },
 };
 
 export const getTokenAddress = (chainId: CHAINS, token: TOKENS): string => {
diff --git a/packages/constants/src/withdrawal_queue.ts b/packages/constants/src/withdrawal_queue.ts
index 04ae382..bc1e366 100644
--- a/packages/constants/src/withdrawal_queue.ts
+++ b/packages/constants/src/withdrawal_queue.ts
@@ -6,6 +6,7 @@ export const WITHDRAWAL_QUEUE_BY_NETWORK: {
 } = {
   [CHAINS.Mainnet]: '0x889edC2eDab5f40e902b864aD4d7AdE8E412F9B1',
   [CHAINS.Goerli]: '0xCF117961421cA9e546cD7f50bC73abCdB3039533',
+  [CHAINS.Holesky]: '0xc7cc160b58F8Bb0baC94b80847E2CF2800565C50',
 };
 
 export const getWithdrawalQueueAddress = (chainId: CHAINS): string => {
diff --git a/packages/helpers/src/etherscan.ts b/packages/helpers/src/etherscan.ts
index 18cc3c7..beb336e 100644
--- a/packages/helpers/src/etherscan.ts
+++ b/packages/helpers/src/etherscan.ts
@@ -17,6 +17,7 @@ export const ETHERSCAN_PREFIX_BY_NETWORK: {
   [CHAINS.Rinkeby]: 'rinkeby.',
   [CHAINS.Goerli]: 'goerli.',
   [CHAINS.Kovan]: 'kovan.',
+  [CHAINS.Holesky]: 'holesky.',
 };
 
 export const getEtherscanPrefix = (chainId: CHAINS): string => {