diff --git a/.changeset/unlucky-carrots-retire.md b/.changeset/unlucky-carrots-retire.md
new file mode 100644
index 0000000000..cbff1dcefd
--- /dev/null
+++ b/.changeset/unlucky-carrots-retire.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added Guru Network.
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a981b0c7cd..43a774bcba 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -53,7 +53,7 @@ importers:
         version: 20.16.12
       '@vitest/coverage-v8':
         specifier: ^1.0.4
-        version: 1.0.4(vitest@1.0.4)
+        version: 1.0.4(vitest@1.0.4(@types/node@20.16.12)(@vitest/ui@1.0.4)(terser@5.36.0))
       '@vitest/ui':
         specifier: ^1.0.4
         version: 1.0.4(vitest@1.0.4)
@@ -7585,7 +7585,7 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  '@vitest/coverage-v8@1.0.4(vitest@1.0.4)':
+  '@vitest/coverage-v8@1.0.4(vitest@1.0.4(@types/node@20.16.12)(@vitest/ui@1.0.4)(terser@5.36.0))':
     dependencies:
       '@ampproject/remapping': 2.3.0
       '@bcoe/v8-coverage': 0.2.3
diff --git a/src/chains/definitions/guruNetwork.ts b/src/chains/definitions/guruNetwork.ts
new file mode 100644
index 0000000000..7d70b099b4
--- /dev/null
+++ b/src/chains/definitions/guruNetwork.ts
@@ -0,0 +1,29 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const guruNetwork = /*#__PURE__*/ defineChain({
+  id: 260,
+  name: 'Guru Network Mainnet',
+  nativeCurrency: {
+    name: 'GURU Token',
+    symbol: 'GURU',
+    decimals: 18,
+  },
+  rpcUrls: {
+    default: {
+      http: ['https://rpc.gurunetwork.ai/archive/260'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Guruscan',
+      url: 'https://scan.gurunetwork.ai',
+    },
+  },
+  contracts: {
+    multicall3: {
+      address: '0xca11bde05977b3631167028862be2a173976ca11',
+      blockCreated: 271691,
+    },
+  },
+  testnet: false,
+})
diff --git a/src/chains/definitions/guruTestnet.ts b/src/chains/definitions/guruTestnet.ts
index e0e7e13455..39155d5054 100644
--- a/src/chains/definitions/guruTestnet.ts
+++ b/src/chains/definitions/guruTestnet.ts
@@ -4,7 +4,7 @@ export const guruTestnet = /*#__PURE__*/ defineChain({
   id: 261,
   name: 'Guru Network Testnet',
   nativeCurrency: {
-    name: 'testGURU',
+    name: 'tGURU Token',
     symbol: 'tGURU',
     decimals: 18,
   },
@@ -16,7 +16,7 @@ export const guruTestnet = /*#__PURE__*/ defineChain({
   blockExplorers: {
     default: {
       name: 'Guruscan',
-      url: 'https://scan.gurunetwork.ai',
+      url: 'https://sepolia.gurunetwork.ai',
     },
   },
   testnet: true,
diff --git a/src/chains/index.ts b/src/chains/index.ts
index c3dc9ca87d..8ad7e6b42c 100644
--- a/src/chains/index.ts
+++ b/src/chains/index.ts
@@ -172,6 +172,7 @@ export { goChain } from './definitions/goChain.js'
 export { godwoken } from './definitions/godwoken.js'
 export { goerli } from './definitions/goerli.js'
 export { gravity } from './definitions/gravity.js'
+export { guruNetwork } from './definitions/guruNetwork.js'
 export { guruTestnet } from './definitions/guruTestnet.js'
 export { ham } from './definitions/ham.js'
 export { haqqMainnet } from './definitions/haqqMainnet.js'