diff --git a/apps/assets/views/asset.py b/apps/assets/views/asset.py
index 596c43d1e..f2b3035df 100644
--- a/apps/assets/views/asset.py
+++ b/apps/assets/views/asset.py
@@ -5,6 +5,7 @@ import csv
 import json
 import uuid
 import codecs
+import chardet
 from io import StringIO
 from collections import defaultdict
 
@@ -243,10 +244,11 @@ class BulkImportAssetView(AdminUserRequiredMixin, JSONResponseMixin, FormView):
     form_class = forms.FileForm
 
     def form_valid(self, form):
-        file = form.cleaned_data['file']
-        data = file.read().decode('utf-8').strip(
-            codecs.BOM_UTF8.decode('utf-8'))
-        csv_file = StringIO(data)
+        f = form.cleaned_data['file']
+        det_result = chardet.detect(f.read())
+        f.seek(0)  # reset file seek index
+        file_data = f.read().decode(det_result['encoding']).strip(codecs.BOM_UTF8.decode())
+        csv_file = StringIO(file_data)
         reader = csv.reader(csv_file)
         csv_data = [row for row in reader]
         fields = [
@@ -270,8 +272,15 @@ class BulkImportAssetView(AdminUserRequiredMixin, JSONResponseMixin, FormView):
         for row in csv_data[1:]:
             if set(row) == {''}:
                 continue
+
             asset_dict = dict(zip(attr, row))
             id_ = asset_dict.pop('id', 0)
+
+            try:
+                id_ = int(id_)
+            except ValueError:
+                id_ = 0
+
             asset = get_object_or_none(Asset, id=id_)
             for k, v in asset_dict.items():
                 if k == 'idc':
@@ -295,11 +304,13 @@ class BulkImportAssetView(AdminUserRequiredMixin, JSONResponseMixin, FormView):
             if not asset:
                 try:
                     groups = asset_dict.pop('groups')
+                    if len(Asset.objects.filter(hostname=asset_dict.get('hostname'))):
+                        raise Exception(_('already exists'))
                     asset = Asset.objects.create(**asset_dict)
                     asset.groups.set(groups)
                     created.append(asset_dict['hostname'])
                     assets.append(asset)
-                except IndexError as e:
+                except Exception as e:
                     failed.append('%s: %s' % (asset_dict['hostname'], str(e)))
             else:
                 for k, v in asset_dict.items():
@@ -317,6 +328,7 @@ class BulkImportAssetView(AdminUserRequiredMixin, JSONResponseMixin, FormView):
         if assets:
             update_assets_hardware_info.delay([asset._to_secret_json() for asset in assets])
 
+
         data = {
             'created': created,
             'created_info': 'Created {}'.format(len(created)),
diff --git a/apps/users/models/user.py b/apps/users/models/user.py
index fc40ee87a..660b5f350 100644
--- a/apps/users/models/user.py
+++ b/apps/users/models/user.py
@@ -204,7 +204,7 @@ class User(AbstractUser):
             'wechat': self.wechat,
             'phone': self.phone,
             'comment': self.comment,
-            'date_expired': self.date_expired.strftime('%Y-%m-%d %H:%M:%S')
+            'date_expired': self.date_expired.strftime('%Y-%m-%d %H:%M:%S') if self.date_expired is not None else None
         })
 
     @classmethod
diff --git a/apps/users/templates/users/user_profile.html b/apps/users/templates/users/user_profile.html
index 93a14ef86..c57eeb611 100644
--- a/apps/users/templates/users/user_profile.html
+++ b/apps/users/templates/users/user_profile.html
@@ -22,7 +22,7 @@
                         </ul>
                     </div>
                     <div class="tab-content">
-                        <div class="col-sm-7">
+                        <div class="col-sm-7" style="padding-left: 0;">
                             <div class="ibox float-e-margins">
                                 <div class="ibox-title">
                                     <span class="label label-primary"><b>{{ user.name }}</b></span>
diff --git a/docs/install.md b/docs/install.md
index 587b012b9..e6b240ab1 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -36,6 +36,10 @@
 	$ sudo yum -y install `cat rpm_requirements.txt`
 	$ pip install -r requirements.txt -i https://pypi.doubanio.com/simple
 
+    // 解决Mac安装ldap提示 Modules/LDAPObject.c:18:10: fatal error: 'sasl.h' file not found
+     pip install python-ldap \
+        --global-option=build_ext \
+        --global-option="-I$(xcrun --show-sdk-path)/usr/include/sasl"
 
 ##### 2.3 准备配置文件
 
diff --git a/requirements/requirements.txt b/requirements/requirements.txt
index e89c13f26..952b041d6 100644
--- a/requirements/requirements.txt
+++ b/requirements/requirements.txt
@@ -5,8 +5,8 @@ djangorestframework>=3.6.2
 ForgeryPy
 #openpyxl>=2.4.0
 celery>=4.0.2
-paramiko>=2.1.2
-ansible>=2.2.2.0
+paramiko==2.1.2
+ansible==2.2.2.0
 django-simple-captcha>=0.5.5
 django-formtools>=2.0
 sshpubkeys>=2.2.0
@@ -21,3 +21,4 @@ gssapi
 django-rest-swagger
 django-auth-ldap
 ldap3
+chardet>=3.0.4