diff --git a/oneforall/common/request.py b/oneforall/common/request.py
index e7a1c14..809c849 100644
--- a/oneforall/common/request.py
+++ b/oneforall/common/request.py
@@ -172,10 +172,7 @@ def request_callback(future, index, datas):
         else:
             datas[index]['valid'] = 1
             headers = resp.headers
-            banner = str({'Server': headers.get('Server'),
-                          'Via': headers.get('Via'),
-                          'X-Powered-By': headers.get('X-Powered-By')})
-            datas[index]['banner'] = banner[1:-1]
+            datas[index]['banner'] = utils.get_sample_banner(headers)
             datas[index]['header'] = str(dict(headers))[1:-1]
             if isinstance(text, str):
                 title = get_title(text).strip()
diff --git a/oneforall/common/utils.py b/oneforall/common/utils.py
index 9388548..db17131 100644
--- a/oneforall/common/utils.py
+++ b/oneforall/common/utils.py
@@ -374,3 +374,11 @@ def get_filtered_data(data):
         if valid == 0 or valid == 1:
             filtered_data.append(item)
     return filtered_data
+
+
+def get_sample_banner(headers):
+    server = headers.get('Server') or ''
+    via = headers.get('Via') or ''
+    power = headers.get('X-Powered-By') or ''
+    banner = server + via + power
+    return banner