diff --git a/.changeset/quick-plums-decide.md b/.changeset/quick-plums-decide.md
new file mode 100644
index 0000000000..044dcc422b
--- /dev/null
+++ b/.changeset/quick-plums-decide.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Updated Soneium Minato Testnet
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 0615195c67..993685326a 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -14553,4 +14553,4 @@ snapshots:
 
   zod@3.22.4: {}
 
-  zwitch@2.0.4: {}
+  zwitch@2.0.4: {}
\ No newline at end of file
diff --git a/site/pages/op-stack/chains.md b/site/pages/op-stack/chains.md
index b30aaeef12..649998e67c 100644
--- a/site/pages/op-stack/chains.md
+++ b/site/pages/op-stack/chains.md
@@ -12,6 +12,7 @@ import {
   optimism, // [!code hl]
   optimismGoerli, // [!code hl]
   optimismSepolia, // [!code hl]
+  soneiumMinato, // [!code hl]
   zora, // [!code hl]
   zoraSepolia, // [!code hl]
   zoraTestnet, // [!code hl]
diff --git a/src/chains/definitions/soneiumMinato.ts b/src/chains/definitions/soneiumMinato.ts
index 7b56a36254..897a5bb935 100644
--- a/src/chains/definitions/soneiumMinato.ts
+++ b/src/chains/definitions/soneiumMinato.ts
@@ -1,9 +1,13 @@
+import { chainConfig } from '../../op-stack/chainConfig.js'
 import { defineChain } from '../../utils/chain/defineChain.js'
 
-export const soneiumMinato = defineChain({
+const sourceId = 11_155_111 // sepolia
+
+export const soneiumMinato = /*#__PURE__*/ defineChain({
+  ...chainConfig,
   id: 1946,
-  name: 'Soneium Minato',
-  nativeCurrency: { name: 'Ether', symbol: 'ETH', decimals: 18 },
+  name: 'Soneium Minato Testnet',
+  nativeCurrency: { name: 'Sepolia Ether', symbol: 'ETH', decimals: 18 },
   rpcUrls: {
     default: {
       http: ['https://rpc.minato.soneium.org'],
@@ -11,16 +15,40 @@ export const soneiumMinato = defineChain({
   },
   blockExplorers: {
     default: {
-      name: 'Minato Explorer',
+      name: 'Blockscout',
       url: 'https://explorer-testnet.soneium.org',
-      apiUrl: 'https://explorer-testnet.soneium.org/api/',
+      apiUrl: 'https://explorer-testnet.soneium.org/api',
     },
   },
   contracts: {
+    ...chainConfig.contracts,
+    disputeGameFactory: {
+      [sourceId]: {
+        address: '0xF69dB6cA559C52d9A4BB6e2B2901f490Ca35Fbf6',
+      },
+    },
+    l2OutputOracle: {
+      [sourceId]: {
+        address: '0x710e5286C746eC38beeB7538d0146f60D27be343',
+      },
+    },
+    portal: {
+      [sourceId]: {
+        address: '0x65ea1489741A5D72fFdD8e6485B216bBdcC15Af3',
+        blockCreated: 6466136,
+      },
+    },
+    l1StandardBridge: {
+      [sourceId]: {
+        address: '0x5f5a404A5edabcDD80DB05E8e54A78c9EBF000C2',
+        blockCreated: 6466136,
+      },
+    },
     multicall3: {
       address: '0xcA11bde05977b3631167028862bE2a173976CA11',
       blockCreated: 1,
     },
   },
   testnet: true,
+  sourceId,
 })
diff --git a/src/op-stack/chains.ts b/src/op-stack/chains.ts
index c8482fdc7b..f45924ff19 100644
--- a/src/op-stack/chains.ts
+++ b/src/op-stack/chains.ts
@@ -15,6 +15,7 @@ export { pgnTestnet } from '../chains/definitions/pgnTestnet.js'
 export { shape } from '../chains/definitions/shape.js'
 export { snax } from '../chains/definitions/snax.js'
 export { snaxTestnet } from '../chains/definitions/snaxTestnet.js'
+export { soneiumMinato } from '../chains/definitions/soneiumMinato.js'
 export { zora } from '../chains/definitions/zora.js'
 export { zoraSepolia } from '../chains/definitions/zoraSepolia.js'
 export { zoraTestnet } from '../chains/definitions/zoraTestnet.js'