diff --git a/package.json b/package.json
index b633f285..e875a103 100644
--- a/package.json
+++ b/package.json
@@ -69,6 +69,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "firebase": "^7.11.0",
+    "postcss-cli": "^7.1.0",
     "react": "^16.13.0",
     "react-dom": "^16.13.0",
     "react-intl": "^3.12.1",