diff --git a/CHANGELOG.md b/CHANGELOG.md
index c54dd8ce..c955f786 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,7 @@
 # Changelog
+## [1.9.0] - 2024-12-02
+- Added default configuration for Arbitrum Sepolia
+
 ## [1.8.2] - 2024-08-30
 ### New
 - Update to the new bundler schema URLs
diff --git a/package-lock.json b/package-lock.json
index b4cd3ea7..2978fe00 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@etherspot/prime-sdk",
-  "version": "1.8.2",
+  "version": "1.9.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@etherspot/prime-sdk",
-      "version": "1.8.2",
+      "version": "1.9.0",
       "license": "MIT",
       "dependencies": {
         "@apollo/client": "3.8.7",
diff --git a/package.json b/package.json
index ee3bdb48..9c085157 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@etherspot/prime-sdk",
-  "version": "1.8.2",
+  "version": "1.9.0",
   "description": "Etherspot Prime (Account Abstraction) SDK",
   "keywords": [
     "ether",
diff --git a/src/sdk/network/constants.ts b/src/sdk/network/constants.ts
index 5e1bdcf9..752c0901 100644
--- a/src/sdk/network/constants.ts
+++ b/src/sdk/network/constants.ts
@@ -452,7 +452,19 @@ export const Networks: {
         simpleAccount: '',
       }
     }
-  }
+  },
+  [421614]: {
+    chainId: 421614,
+    bundler: 'https://testnet-rpc.etherspot.io/v1/421614',
+    contracts: {
+      entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
+      walletFactory: {
+        etherspot: '0x7f6d8F107fE8551160BD5351d5F1514A6aD5d40E',
+        zeroDev: '',
+        simpleAccount: '',
+      }
+    },
+  },
 };
 
 interface ISafeConstant {