diff --git a/package.json b/package.json
index 5b7a60a2f..7975e9d3a 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "lint": "eslint \"packages/*/{src,test}/**/*.ts\"",
     "validate": "scripts/validate.js",
     "preversion": "yarn run test",
-    "version": "lerna run dist --parallel && gltf-transform -h > docs/CLI_HELP.md && git add -u docs",
+    "version": "yarn clean:dist && lerna run dist && gltf-transform -h > docs/CLI_HELP.md && git add -u docs",
     "postpublish": "git push && git push --tags && yarn run docs:deploy",
     "docs": "typedoc packages/core/src/core.ts packages/extensions/src/extensions.ts packages/functions/src/index.ts docs/pages.ts --out docs/dist/ --name glTF-Transform --excludeInternal --excludeNotDocumented --theme docs/theme --media docs/media --readme docs/INDEX.md --includes docs",
     "docs:watch": "concurrently \"yarn docs --watch\" \"vercel dev\"",
diff --git a/packages/core/package.json b/packages/core/package.json
index 5d8c69eb9..d8f61639b 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -7,7 +7,7 @@
   "author": "Don McCurdy <dm@donmccurdy.com>",
   "license": "MIT",
   "main": "dist/core.js",
-  "module": "dist/core.modern.js",
+  "module": "dist/core.modern.mjs",
   "source": "src/core.ts",
   "types": "dist/core.d.ts",
   "sideEffects": false,
diff --git a/packages/extensions/package.json b/packages/extensions/package.json
index 1a8d65b1d..f8978c349 100644
--- a/packages/extensions/package.json
+++ b/packages/extensions/package.json
@@ -7,7 +7,7 @@
   "author": "Don McCurdy <dm@donmccurdy.com>",
   "license": "MIT",
   "main": "dist/extensions.js",
-  "module": "dist/extensions.modern.js",
+  "module": "dist/extensions.modern.mjs",
   "source": "src/extensions.ts",
   "types": "dist/extensions.d.ts",
   "sideEffects": false,
diff --git a/packages/functions/package.json b/packages/functions/package.json
index d9aee389d..3f8e4e112 100644
--- a/packages/functions/package.json
+++ b/packages/functions/package.json
@@ -7,7 +7,7 @@
   "author": "Don McCurdy <dm@donmccurdy.com>",
   "license": "MIT",
   "main": "dist/functions.js",
-  "module": "dist/functions.modern.js",
+  "module": "dist/functions.modern.mjs",
   "source": "src/index.ts",
   "types": "dist/index.d.ts",
   "sideEffects": false,