diff --git a/.changeset/nervous-cougars-brush.md b/.changeset/nervous-cougars-brush.md
new file mode 100644
index 0000000..6eb2911
--- /dev/null
+++ b/.changeset/nervous-cougars-brush.md
@@ -0,0 +1,5 @@
+---
+"@zcloak/ui-store": patch
+---
+
+fix emit event error
diff --git a/packages/ui-store/src/BrowserSession.ts b/packages/ui-store/src/BrowserSession.ts
index 716f19b..3956ff3 100644
--- a/packages/ui-store/src/BrowserSession.ts
+++ b/packages/ui-store/src/BrowserSession.ts
@@ -10,7 +10,7 @@ export class BrowserSession extends BaseStore {
   constructor() {
     super();
     this.#session = new SessionStorage();
-    this.#session.on('store_changed', (event, ...args) => this.emit(event, ...args));
+    this.#session.on('store_changed', (...args) => this.emit('store_changed', ...args));
   }
 
   public async all(): Promise<[string, unknown][]> {
diff --git a/packages/ui-store/src/BrowserStore.ts b/packages/ui-store/src/BrowserStore.ts
index a11c644..223a408 100644
--- a/packages/ui-store/src/BrowserStore.ts
+++ b/packages/ui-store/src/BrowserStore.ts
@@ -10,7 +10,7 @@ export class BrowserStore extends BaseStore {
   constructor() {
     super();
     this.#store = new LocalStorage();
-    this.#store.on('store_changed', (event, ...args) => this.emit(event, ...args));
+    this.#store.on('store_changed', (...args) => this.emit('store_changed', ...args));
   }
 
   public async all(): Promise<[string, unknown][]> {
diff --git a/packages/ui-store/src/store/SessionStorage.ts b/packages/ui-store/src/store/SessionStorage.ts
index a56f82c..9d72d9e 100644
--- a/packages/ui-store/src/store/SessionStorage.ts
+++ b/packages/ui-store/src/store/SessionStorage.ts
@@ -50,8 +50,8 @@ export class SessionStorage extends Events<StorageEvent> {
     sessionStorage.setItem(key, val);
     const oldValue = this.#items.get(key);
 
-    this.#items.set(key, val);
-    this.emit('store_changed', key, oldValue, val);
+    this.#items.set(key, value);
+    this.emit('store_changed', key, oldValue, value);
   }
 
   public remove(key: string) {