diff --git a/packages/client/src/pizzax.ts b/packages/client/src/pizzax.ts
index 0611599a2..fc01e92ee 100644
--- a/packages/client/src/pizzax.ts
+++ b/packages/client/src/pizzax.ts
@@ -10,6 +10,8 @@ type StateDef = Record<string, {
 
 type ArrayElement<A> = A extends readonly (infer T)[] ? T : never;
 
+const connection = $i && stream.useChannel('main');
+
 export class Storage<T extends StateDef> {
 	public readonly key: string;
 	public readonly keyForLocalStorage: string;
@@ -20,8 +22,6 @@ export class Storage<T extends StateDef> {
 	public readonly state: { [K in keyof T]: T[K]['default'] };
 	public readonly reactiveState: { [K in keyof T]: Ref<T[K]['default']> };
 
-	private connection = stream.useChannel('main');
-
 	constructor(key: string, def: T) {
 		this.key = key;
 		this.keyForLocalStorage = 'pizzax::' + key;
@@ -73,7 +73,7 @@ export class Storage<T extends StateDef> {
 				});
 			}, 1);
 			// streamingのuser storage updateイベントを監視して更新
-			this.connection.on('registryUpdated', ({ scope, key, value }: { scope: string[], key: keyof T, value: T[typeof key]['default'] }) => {
+			connection?.on('registryUpdated', ({ scope, key, value }: { scope: string[], key: keyof T, value: T[typeof key]['default'] }) => {
 				if (scope[1] !== this.key || this.state[key] === value) return;
 
 				this.state[key] = value;