diff --git a/package.json b/package.json
index d0a7c217..cc90c5c7 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   },
   "license": "MIT",
   "author": "Chintan Prajapati",
-  "sideEffects": false,
+  "sideEffects": ["*.css"],
   "exports": {
     "./package.json": "./package.json",
     "./plyr.css": "./plyr.css",