diff --git a/.changeset/adding_kroma.md b/.changeset/adding_kroma.md
new file mode 100644
index 000000000..480c21d05
--- /dev/null
+++ b/.changeset/adding_kroma.md
@@ -0,0 +1,11 @@
+---
+"@usedapp/core": patch
+---
+
+Adding the network kroma mainnet:
+
+https://blockscout.kroma.network/
+
+https://kroma.network/
+
+it does not have verified contracts yet in the explorer, adding multicall address later.
diff --git a/packages/core/src/constants/chainId.ts b/packages/core/src/constants/chainId.ts
index 3f9c607c2..8f02f9838 100644
--- a/packages/core/src/constants/chainId.ts
+++ b/packages/core/src/constants/chainId.ts
@@ -67,6 +67,7 @@ import {
   LineaTestnet,
   MantleTestnet,
   KromaSepoliaTestnet,
+  KromaMainnet,
 } from '../model'
 
 // rough alphabet order (put network from the same chain together)
@@ -138,6 +139,7 @@ export const DEFAULT_SUPPORTED_CHAINS = [
   LineaTestnet,
   MantleTestnet,
   KromaSepoliaTestnet,
+  KromaMainnet,
 ]
 
 export enum ChainId {
@@ -208,4 +210,6 @@ export enum ChainId {
   LineaTestnet = 59140,
   ArbitrumNova = 42170,
   MantleTestnet = 5001,
+  Kroma = 255,
+  KromaSepolia = 2358,
 }
diff --git a/packages/core/src/hooks/useConfig.test.tsx b/packages/core/src/hooks/useConfig.test.tsx
index 21c64cd86..990338728 100644
--- a/packages/core/src/hooks/useConfig.test.tsx
+++ b/packages/core/src/hooks/useConfig.test.tsx
@@ -26,7 +26,7 @@ describe('useConfig', () => {
     const { result, waitForCurrent } = await renderDAppHook(() => useConfig(), { config: setup.config })
     await waitForCurrent((val) => val !== undefined)
     expect(result.error).to.be.undefined
-    expect(result.current.networks?.length).to.eq(67)
+    expect(result.current.networks?.length).to.eq(68)
     expect(result.current.notifications?.checkInterval).to.eq(500)
     expect(result.current.notifications?.expirationPeriod).to.eq(5000)
   })
diff --git a/packages/core/src/model/chain/kroma.ts b/packages/core/src/model/chain/kroma.ts
index 354da1209..2c66587ed 100644
--- a/packages/core/src/model/chain/kroma.ts
+++ b/packages/core/src/model/chain/kroma.ts
@@ -19,3 +19,22 @@ export const KromaSepoliaTestnet: Chain = {
   getExplorerAddressLink: getAddressLink(KromaSepoliaExplorerUrl),
   getExplorerTransactionLink: getTransactionLink(KromaSepoliaExplorerUrl),
 }
+
+const KromaExplorerUrl = 'https://blockscout.kroma.network/'
+
+export const KromaMainnet: Chain = {
+  chainId: 255,
+  chainName: 'Kroma',
+  isTestChain: false,
+  isLocalChain: false,
+  multicallAddress: '0xE3c886498ac54433F2B0E6842FAE421006067751',
+  rpcUrl: 'https://api.kroma.network/',
+  nativeCurrency: {
+    name: 'ETH',
+    symbol: 'ETH',
+    decimals: 18,
+  },
+  blockExplorerUrl: KromaExplorerUrl,
+  getExplorerAddressLink: getAddressLink(KromaExplorerUrl),
+  getExplorerTransactionLink: getTransactionLink(KromaExplorerUrl),
+}