diff --git a/app.py b/app.py
index 0acc39d..40024aa 100644
--- a/app.py
+++ b/app.py
@@ -327,7 +327,7 @@ def search_by_email():
         for domain, info in customer.items():
             if 'email addresses' in info and isinstance(info['email addresses'], list):
                 for email_record in info['email addresses']:
-                    if email_record.get('email address') == email:
+                    if email_record.get('email address').lower() == email:
                         # 找到匹配的记录，跳转到对应的 index
                         return redirect(url_for('view_customer', index=index))
 
@@ -345,7 +345,7 @@ def search_by_domain():
     reload_buf(key, buf)
     # 遍历 customer_data 查找匹配的域名
     for index, customer in enumerate(customer_data):
-        if domain in customer:
+        if domain.lower() in customer:
             # 找到匹配的域名，跳转到对应的 index
             return redirect(url_for('view_customer', index=index))