diff --git a/app/api/mobile/apis/project_packages.rb b/app/api/mobile/apis/project_packages.rb
index d17a154b..5570304a 100644
--- a/app/api/mobile/apis/project_packages.rb
+++ b/app/api/mobile/apis/project_packages.rb
@@ -100,7 +100,7 @@ module Mobile
           requires :title, type: String, desc: '标题'
           requires :content, type: String, desc: '描述'
           optional :attachment_ids, type: Array[Integer], desc: '附件ID数组'
-          requires :deadline_at, type: DateTime, desc: '截止日期'
+          requires :deadline_at, type: String, desc: '截止日期'
           optional :min_price, type: Float, desc: '最小费用'
           optional :max_price, type: Float, desc: '最大费用'
           requires :contact_name, type: String, desc: '联系人姓名'
@@ -128,7 +128,7 @@ module Mobile
           requires :title, type: String, desc: '标题'
           requires :content, type: String, desc: '描述'
           optional :attachment_ids, type: Array[Integer], desc: '附件ID数组'
-          requires :deadline_at, type: DateTime, desc: '截止日期'
+          requires :deadline_at, type: String, desc: '截止日期'
           optional :min_price, type: Float, desc: '最小费用'
           optional :max_price, type: Float, desc: '最大费用'
           requires :contact_name, type: String, desc: '联系人姓名'
diff --git a/app/api/mobile/entities/project_package.rb b/app/api/mobile/entities/project_package.rb
index 684913e7..9871dcef 100644
--- a/app/api/mobile/entities/project_package.rb
+++ b/app/api/mobile/entities/project_package.rb
@@ -21,13 +21,13 @@ module Mobile
       expose :contact_phone, if: ->(package, opts){ opts[:user].id == package.creator_id || opts[:user].admin? || opts[:user].business?  }
 
       expose :updated_at do |package, _|
-        package.updated_at.try(:utc).try(:iso8601)
+        package.updated_at.strftime('%Y-%m-%d %H:%M:%S')
       end
       expose :deadline_at do |package, _|
-        package.deadline_at.try(:utc).try(:iso8601)
+        package.deadline_at.try(:strftime, '%Y-%m-%d %H:%M:%S')
       end
       expose :published_at do |package, _|
-        package.published_at.try(:utc).try(:iso8601)
+        package.published_at.try(:strftime, '%Y-%m-%d %H:%M:%S')
       end
 
       expose :creator, if: { type: :show } do |package, _|