diff --git a/sdk/js/CHANGELOG.md b/sdk/js/CHANGELOG.md
index 2737da64..dd268c04 100644
--- a/sdk/js/CHANGELOG.md
+++ b/sdk/js/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.1.4
+
+initial AVAX testnet support
+
 ## 0.1.3
 
 ### Added
diff --git a/sdk/js/package.json b/sdk/js/package.json
index 44b83f67..2b1bf3aa 100644
--- a/sdk/js/package.json
+++ b/sdk/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@certusone/wormhole-sdk",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "SDK for interacting with Wormhole",
   "homepage": "https://wormholenetwork.com",
   "main": "./lib/cjs/index.js",
diff --git a/sdk/js/src/utils/array.ts b/sdk/js/src/utils/array.ts
index 99fba647..c4484cc7 100644
--- a/sdk/js/src/utils/array.ts
+++ b/sdk/js/src/utils/array.ts
@@ -6,17 +6,22 @@ import {
   CHAIN_ID_TERRA,
   CHAIN_ID_POLYGON,
   CHAIN_ID_ETHEREUM_ROPSTEN,
+  CHAIN_ID_AVAX,
 } from "./consts";
 import { humanAddress, canonicalAddress, isNativeDenom } from "../terra";
 import { PublicKey } from "@solana/web3.js";
 import { hexValue, hexZeroPad, stripZeros } from "ethers/lib/utils";
 import { arrayify, zeroPad } from "@ethersproject/bytes";
 
-export const isEVMChain = (chainId: ChainId) =>
-  chainId === CHAIN_ID_ETH ||
-  chainId === CHAIN_ID_BSC ||
-  chainId === CHAIN_ID_ETHEREUM_ROPSTEN ||
-  chainId === CHAIN_ID_POLYGON;
+export const isEVMChain = (chainId: ChainId) => {
+  return (
+    chainId === CHAIN_ID_ETH ||
+    chainId === CHAIN_ID_BSC ||
+    chainId === CHAIN_ID_ETHEREUM_ROPSTEN ||
+    chainId === CHAIN_ID_AVAX ||
+    chainId === CHAIN_ID_POLYGON
+  );
+};
 
 export const isHexNativeTerra = (h: string) => h.startsWith("01");
 export const nativeTerraHexToDenom = (h: string) =>
diff --git a/sdk/js/src/utils/consts.ts b/sdk/js/src/utils/consts.ts
index 63d64000..8e6196c1 100644
--- a/sdk/js/src/utils/consts.ts
+++ b/sdk/js/src/utils/consts.ts
@@ -1,9 +1,10 @@
-export type ChainId = 1 | 2 | 3 | 4 | 5 | 10001;
+export type ChainId = 1 | 2 | 3 | 4 | 5 | 6 | 10001;
 export const CHAIN_ID_SOLANA: ChainId = 1;
 export const CHAIN_ID_ETH: ChainId = 2;
 export const CHAIN_ID_TERRA: ChainId = 3;
 export const CHAIN_ID_BSC: ChainId = 4;
 export const CHAIN_ID_POLYGON: ChainId = 5;
+export const CHAIN_ID_AVAX: ChainId = 6;
 export const CHAIN_ID_ETHEREUM_ROPSTEN: ChainId = 10001;
 
 export const WSOL_ADDRESS = "So11111111111111111111111111111111111111112";