diff --git a/package-lock.json b/package-lock.json
index 0c6a3b5..04ef583 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@rocicorp/undo",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@rocicorp/undo",
-      "version": "0.1.0",
+      "version": "0.2.0",
       "devDependencies": {
         "@types/chai": "^4.3.0",
         "@types/mocha": "^9.1.0",
diff --git a/package.json b/package.json
index 72e6cc2..d4a0405 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
   },
   "type": "module",
   "types": "out/index.d.ts",
+  "main": "out/index.js",
   "exports": {
     ".": "./out/index.js"
   },