diff --git a/package.json b/package.json
index b17526d1..b9669d0f 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
   "scripts": {
     "start": "yarn --cwd ./docs start",
     "build:docs": "yarn --cwd ./docs build",
-    "build:packages": "yarn clean:packages && lerna exec --parallel -- microbundle --compress",
+    "build:packages": "yarn clean:packages && lerna exec -- microbundle --compress",
     "clean:packages": "rm -rf ./packages/*/dist",
     "lint": "eslint --quiet --no-error-on-unmatched-pattern ./",
     "test:open": "cypress open --project tests",