diff --git a/package.json b/package.json
index 7974e3b..13f3399 100644
--- a/package.json
+++ b/package.json
@@ -19,12 +19,17 @@
     "dist",
     "types"
   ],
-  "main": "dist/fathom-client.js",
+  "type": "module",
   "module": "dist/fathom-client.esm.js",
+  "main": "dist/fathom-client.cjs",
+  "exports": {
+    "import": "./dist/fathom-client.esm.js",
+    "require": "./dist/fathom-client.cjs"
+  },
   "types": "types/index.d.ts",
   "scripts": {
     "build": "npm run build:types && npm run build:cjs && npm run build:esm",
-    "build:cjs": "esbuild src/index.ts --bundle --format=cjs --outfile=dist/fathom-client.js",
+    "build:cjs": "esbuild src/index.ts --bundle --format=cjs --outfile=dist/fathom-client.cjs",
     "build:esm": "esbuild src/index.ts --bundle --format=esm --outfile=dist/fathom-client.esm.js",
     "build:types": "tsc --emitDeclarationOnly",
     "lint": "npx tsc --noEmit && npx prettier src -c",