diff --git a/packages/fraction/package.json b/packages/fraction/package.json
index 6d80390..f6692a4 100644
--- a/packages/fraction/package.json
+++ b/packages/fraction/package.json
@@ -6,6 +6,7 @@
     "name": "SundaeSwap Labs, Inc.",
     "url": "https://www.sundaeswap.finance/"
   },
+  "type": "module",
   "license": "UNLICENSED",
   "sideEffects": false,
   "exports": {
diff --git a/packages/json-bigint/package.json b/packages/json-bigint/package.json
index a7999bb..0f3e3c7 100644
--- a/packages/json-bigint/package.json
+++ b/packages/json-bigint/package.json
@@ -5,6 +5,7 @@
   "repository": "https://github.com/sundaeswap-finance/defi-sdk/tree/master/packages/json-bigint",
   "license": "MIT",
   "sideEffects": false,
+  "type": "module",
   "exports": {
     ".": {
       "import": "./dist/esm/index.js",