diff --git a/blog/documents.py b/blog/documents.py
index 699d9bc..40c347a 100644
--- a/blog/documents.py
+++ b/blog/documents.py
@@ -29,6 +29,7 @@ class ElapsedTimeDocument(Document):
     time_taken = Integer()
     log_datetime = Date()
     type = Text(analyzer='ik_max_word')
+    useragent = Text()
 
     class Index:
         name = 'performance'
@@ -44,12 +45,12 @@ class ElapsedTimeDocument(Document):
 class ElaspedTimeDocumentManager():
 
     @staticmethod
-    def create(url, time_taken, log_datetime, type):
+    def create(url, time_taken, log_datetime, type, useragent):
         if not hasattr(ElaspedTimeDocumentManager, 'mapping_created'):
             ElapsedTimeDocument.init()
             setattr(ElaspedTimeDocumentManager, 'mapping_created', True)
         doc = ElapsedTimeDocument(meta={'id': int(round(time.time() * 1000))}, url=url, time_taken=time_taken,
-                                  log_datetime=log_datetime, type=type)
+                                  log_datetime=log_datetime, type=type, useragent=useragent)
         doc.save()
 
 
diff --git a/blog/middleware.py b/blog/middleware.py
index f24ed98..622b804 100644
--- a/blog/middleware.py
+++ b/blog/middleware.py
@@ -38,6 +38,6 @@ class OnlineMiddleware(object):
             from django.utils import timezone
 
             ElaspedTimeDocumentManager.create(url=url, time_taken=time_taken, log_datetime=timezone.now(),
-                                              type='blog')
+                                              type='blog', useragent=http_user_agent)
         response.content = response.content.replace(b'<!!LOAD_TIMES!!>', str.encode(str(cast_time)[:5]))
         return response