diff --git a/packages/autocomplete-theme-classic/package.json b/packages/autocomplete-theme-classic/package.json
index 33fbc3e93..349d447a4 100644
--- a/packages/autocomplete-theme-classic/package.json
+++ b/packages/autocomplete-theme-classic/package.json
@@ -9,7 +9,7 @@
     "name": "Algolia, Inc.",
     "url": "https://www.algolia.com"
   },
-  "sideEffects": false,
+  "sideEffects": ["*.css"],
   "files": [
     "dist/"
   ],