diff --git a/app/api/controller/InformationController.php b/app/api/controller/InformationController.php
index 5e991b001..0833a5572 100644
--- a/app/api/controller/InformationController.php
+++ b/app/api/controller/InformationController.php
@@ -94,7 +94,11 @@ class InformationController extends BaseApiController
         if(isset($param['task_id'])&& $param['task_id']>0){
             $task=Task::where('id',$param['task_id'])->find();
             $extend=$task['extend'];
-            $extend['informationg']['update']+=1;
+            if(isset($extend['informationg']['update'])){
+                $extend['informationg']['update']+=1;
+            }else{
+                $extend['informationg']['update']=1;
+            }
             $extend['informationg']['ids'][]=$param['id'];
             $task->extend=json_encode($extend);
             if($extend['informationg']['update']>=5){