diff --git a/.eslintignore b/.eslintignore
index 65a5473..684767e 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,3 +1,4 @@
 dist
 prettier.config.js
 karma.config.js
+dist-cjs
diff --git a/.gitignore b/.gitignore
index 1eae0cf..45806da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 dist/
+dist-cjs/
 node_modules/
diff --git a/package.json b/package.json
index cd66e61..6119be9 100644
--- a/package.json
+++ b/package.json
@@ -2,9 +2,15 @@
   "name": "@github/combobox-nav",
   "description": "Attach combobox navigation behavior to an input.",
   "version": "2.1.5",
-  "main": "dist/index.js",
+  "main": "dist-cjs/index.js",
   "module": "dist/index.js",
-  "type": "module",
+  "exports": {
+    ".": {
+      "node": "./dist-cjs/index.js",
+      "require": "./dist-cjs/index.js",
+      "default": "./dist/index.js"
+    }
+  },
   "types": "dist/index.d.ts",
   "license": "MIT",
   "repository": "github/combobox-nav",
@@ -16,7 +22,7 @@
     "clean": "rm -rf dist",
     "lint": "eslint .",
     "prebuild": "npm run clean && npm run lint && mkdir dist",
-    "build": "tsc",
+    "build": "tsc && tsc --module commonjs --outDir dist-cjs",
     "test": "karma start karma.config.cjs",
     "pretest": "npm run build",
     "prepublishOnly": "npm run build",