diff --git a/package.json b/package.json
index c41e08492b..74fcafdaac 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,6 @@
   "unpkg": "dist/react-query.development.js",
   "types": "types/index.d.ts",
   "module": "es/index.js",
-  "sideEffects": false,
   "scripts": {
     "test": "is-ci \"test:ci\" \"test:dev\"",
     "test:dev": "npm run test:types && npm run test:eslint && jest --watch",
diff --git a/src/core/queryCache.ts b/src/core/queryCache.ts
index f02c3232de..b3be3f9e50 100644
--- a/src/core/queryCache.ts
+++ b/src/core/queryCache.ts
@@ -378,9 +378,6 @@ export class QueryCache {
     return query.fetch(undefined, resolvedConfig)
   }
 
-  /**
-   * @deprecated
-   */
   // Parameter syntax with optional prefetch options
   prefetchQuery<TResult = unknown, TError = unknown>(
     queryKey: QueryKey,