diff --git a/package-lock.json b/package-lock.json
index 8d2d759..510b464 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,15 @@
 {
   "name": "@quicknode/x402",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@quicknode/x402",
-      "version": "0.1.2",
+      "version": "0.1.3",
       "license": "MIT",
       "dependencies": {
-        "@circle-fin/x402-batching": "^2.0.4",
+        "@circle-fin/x402-batching": "^3.0.2",
         "@connectrpc/connect": "^2.0.0",
         "@connectrpc/connect-web": "^2.0.0",
         "@solana/codecs": "^2.1.0",
@@ -283,9 +283,9 @@
       "peer": true
     },
     "node_modules/@circle-fin/x402-batching": {
-      "version": "2.0.4",
-      "resolved": "https://registry.npmjs.org/@circle-fin/x402-batching/-/x402-batching-2.0.4.tgz",
-      "integrity": "sha512-q1rGOuFHyday0Rbc5V9PnNmoRotxGjc+CxqimjW+A0fjcdvYUi3Lnud/+94/KYqUqFLgOR9/5E2X41a1HxaA4g==",
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@circle-fin/x402-batching/-/x402-batching-3.0.2.tgz",
+      "integrity": "sha512-e8ysgHxgNjgck0M5Ajhx84GRb75vGJHSfat4JDtSLWQLJR+j+UEzYcw/WfKzAU69AXQGujv9EeI6gyR3yU1tuA==",
       "license": "Apache-2.0",
       "engines": {
         "node": ">=18"
diff --git a/package.json b/package.json
index d263df8..b5656a3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@quicknode/x402",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "Quicknode x402 client — multi-chain payment, SIWX auth, session management",
   "license": "MIT",
   "publishConfig": {
@@ -42,7 +42,7 @@
     "lint:fix": "biome check --write ."
   },
   "dependencies": {
-    "@circle-fin/x402-batching": "^2.0.4",
+    "@circle-fin/x402-batching": "^3.0.2",
     "@connectrpc/connect": "^2.0.0",
     "@connectrpc/connect-web": "^2.0.0",
     "@solana/codecs": "^2.1.0",
diff --git a/src/gateway.ts b/src/gateway.ts
index 02dc07d..26bb9e0 100644
--- a/src/gateway.ts
+++ b/src/gateway.ts
@@ -22,4 +22,6 @@ export const CAIP2_TO_GATEWAY_CHAIN: Record<string, string> = {
   'eip155:84532': 'baseSepolia',
   'eip155:80002': 'polygonAmoy',
   'eip155:5042002': 'arcTestnet',
+  'eip155:8453': 'base',
+  'eip155:137': 'polygon',
 };
diff --git a/test/gateway.spec.ts b/test/gateway.spec.ts
index 2fe0789..ddb8572 100644
--- a/test/gateway.spec.ts
+++ b/test/gateway.spec.ts
@@ -21,6 +21,14 @@ describe('gateway module', () => {
     it('maps Arc Testnet', () => {
       expect(CAIP2_TO_GATEWAY_CHAIN['eip155:5042002']).toBe('arcTestnet');
     });
+
+    it('maps Base Mainnet', () => {
+      expect(CAIP2_TO_GATEWAY_CHAIN['eip155:8453']).toBe('base');
+    });
+
+    it('maps Polygon Mainnet', () => {
+      expect(CAIP2_TO_GATEWAY_CHAIN['eip155:137']).toBe('polygon');
+    });
   });
 
   describe('re-exports', () => {