diff --git a/packages/react-strict-dom/package.json b/packages/react-strict-dom/package.json
index eddbcb75..b7b5f263 100644
--- a/packages/react-strict-dom/package.json
+++ b/packages/react-strict-dom/package.json
@@ -22,6 +22,7 @@
     "README.md",
     "package.json",
     "babel/*",
+    "postcss/*",
     "dist/*"
   ],
   "sideEffects": false,