diff --git a/package.json b/package.json
index 7991719..4b85208 100644
--- a/package.json
+++ b/package.json
@@ -1,12 +1,13 @@
 {
   "name": "@uniswap/router-sdk",
-  "version": "1.8.0",
+  "version": "1.8.1",
   "description": "An sdk for routing swaps using Uniswap v2 and Uniswap v3.",
   "publishConfig": {
     "access": "public"
   },
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
+  "module": "dist/router-sdk.esm.js",
   "files": [
     "dist"
   ],
@@ -30,7 +31,8 @@
     "@uniswap/sdk-core": "^4.0.7",
     "@uniswap/swap-router-contracts": "^1.1.0",
     "@uniswap/v2-sdk": "^4.1.0",
-    "@uniswap/v3-sdk": "^3.10.1"
+    "@uniswap/v3-sdk": "^3.10.1",
+    "jsbi": "^3.1.4"
   },
   "devDependencies": {
     "@types/jest": "^24.0.25",