diff --git a/core/src/use-swr.ts b/core/src/use-swr.ts
index 2d40dc85a..8480ea805 100644
--- a/core/src/use-swr.ts
+++ b/core/src/use-swr.ts
@@ -5,7 +5,7 @@ import ReactExports, {
   useDebugValue,
   useMemo
 } from 'react'
-import { useSyncExternalStore } from 'use-sync-external-store/shim'
+import { useSyncExternalStore } from 'use-sync-external-store/shim/index.js'
 
 import {
   defaultConfig,
diff --git a/infinite/src/index.ts b/infinite/src/index.ts
index c2ae16cf0..d51b8eaa4 100644
--- a/infinite/src/index.ts
+++ b/infinite/src/index.ts
@@ -33,7 +33,7 @@ import type {
   SWRInfiniteCacheValue,
   SWRInfiniteCompareFn
 } from './types'
-import { useSyncExternalStore } from 'use-sync-external-store/shim'
+import { useSyncExternalStore } from 'use-sync-external-store/shim/index.js'
 import { getFirstPageKey } from './serialize'
 
 // const INFINITE_PREFIX = '$inf$'