diff --git a/src/web/lib/util.ts b/src/web/lib/util.ts
index 4529e4c..3d9f015 100644
--- a/src/web/lib/util.ts
+++ b/src/web/lib/util.ts
@@ -45,7 +45,7 @@ export function formatDateJa(dateStr: string): string {
 
 // Get current language preference
 export function getLang(): string {
-  return localStorage.getItem('preferred-lang') || 'ja'
+  return localStorage.getItem('preferred-lang') || 'en'
 }
 
 // Get localized text from a {ja, en} object