diff --git a/package.json b/package.json
index 7b529b6f47..4425013234 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,8 @@
     "**/*.js.map",
     "**/*.d.ts",
     "**/*.scss",
+    "**/*.css",
+    "**/*.css.map",
     "!web-test-runner.config.js",
     "!commitlint.config.js",
     "!**/test/**",