diff --git a/package.json b/package.json
index 5676cd6733da5c516a01267dee8b7fa9a6c2c279..608077e08953361799886e014615bc92d9dfa565 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   ],
   "scripts": {
     "start": "npm-run-all --parallel watch docs-serve",
-    "blc": "blc --filter-level 3 --get --ordered --recursive --host-requests 4 --input http://localhost:3000/",
+    "blc": "blc --exclude-external --filter-level 3 --get --ordered --recursive --host-requests 4 --input http://localhost:3000/",
     "http-server": "http-server --silent -p 3000",
     "bundlesize": "bundlesize",
     "check-broken-links": "npm-run-all --parallel --race \"http-server -- _gh_pages/\" blc",