diff --git a/apps/settings/serializers/other.py b/apps/settings/serializers/other.py
index 65e1e5e07..a999ae6fe 100644
--- a/apps/settings/serializers/other.py
+++ b/apps/settings/serializers/other.py
@@ -9,7 +9,7 @@ class OtherSettingSerializer(serializers.Serializer):
     )
 
     OTP_ISSUER_NAME = serializers.CharField(
-        required=False, max_length=1024, label=_('OTP issuer name'),
+        required=False, max_length=16, label=_('OTP issuer name'),
     )
     OTP_VALID_WINDOW = serializers.IntegerField(
         min_value=1, max_value=10,
diff --git a/apps/templates/flash_message_standalone.html b/apps/templates/flash_message_standalone.html
index 463d6c00e..c038beb41 100644
--- a/apps/templates/flash_message_standalone.html
+++ b/apps/templates/flash_message_standalone.html
@@ -31,7 +31,7 @@
                     {% if confirm_button %}
                         {{ confirm_button }}
                     {% else %}
-                        {% trans 'Go' %}
+                        {% trans 'Confirm' %}
                     {% endif %}
                 </a>
             </div>
diff --git a/apps/users/serializers/user.py b/apps/users/serializers/user.py
index d0357db8a..021437edc 100644
--- a/apps/users/serializers/user.py
+++ b/apps/users/serializers/user.py
@@ -70,6 +70,7 @@ class UserSerializer(CommonBulkSerializerMixin, serializers.ModelSerializer):
 
         read_only_fields = [
             'date_joined', 'last_login', 'created_by', 'is_first_login',
+            'wecom_id', 'dingtalk_id', 'feishu_id'
         ]
         extra_kwargs = {
             'password': {'write_only': True, 'required': False, 'allow_null': True, 'allow_blank': True},