diff --git a/packages/core/package.json b/packages/core/package.json
index e21e85e..8786937 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -4,6 +4,7 @@
   "repository": "git@github.com:WallfacerLabs/bytecodecaller.git",
   "license": "MIT",
   "version": "1.2.0",
+  "type": "module",
   "main": "dist/cjs/index.js",
   "module": "dist/esm/index.js",
   "types": "dist/esm/index.d.ts",
diff --git a/packages/viem/package.json b/packages/viem/package.json
index 4b9bbcb..b44a148 100644
--- a/packages/viem/package.json
+++ b/packages/viem/package.json
@@ -4,6 +4,7 @@
   "repository": "git@github.com:WallfacerLabs/bytecodecaller/viem.git",
   "license": "MIT",
   "version": "1.1.0",
+  "type": "module",
   "main": "dist/cjs/index.js",
   "module": "dist/esm/index.js",
   "types": "dist/esm/index.d.ts",