diff --git a/.changeset/perfect-rabbits-tap.md b/.changeset/perfect-rabbits-tap.md
new file mode 100644
index 00000000..df10bc3f
--- /dev/null
+++ b/.changeset/perfect-rabbits-tap.md
@@ -0,0 +1,5 @@
+---
+"@logto/js": patch
+---
+
+fix an incorrect `Nullable` import in js core
diff --git a/packages/js/src/core/user-info.ts b/packages/js/src/core/user-info.ts
index d99d7d4f..c1ba9d24 100644
--- a/packages/js/src/core/user-info.ts
+++ b/packages/js/src/core/user-info.ts
@@ -1,4 +1,4 @@
-import { type Nullable } from 'vitest';
+import { type Nullable } from '@silverhand/essentials';
 
 import { type IdTokenClaims } from '../index.js';
 import type { Requester } from '../types/index.js';