diff --git a/README.md b/README.md
index c5c9011..e12ac0d 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@
 
 ## installation
 ```bash
+yarn add valtio
 yarn add @jswork/next-react-valtio
 ```
 
diff --git a/index.d.ts b/index.d.ts
index 000afc1..7ae5423 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,3 +1,4 @@
 interface NxStatic {
   ReactValtio: any;
+  $valtio: (initialState: T) => { store: T; state: T };
 }