diff --git a/server/web3spider/tasks/factory.js b/server/web3spider/tasks/factory.js
index 5a9dbb0..4831a75 100644
--- a/server/web3spider/tasks/factory.js
+++ b/server/web3spider/tasks/factory.js
@@ -1,9 +1,9 @@
-const services = {};
+const tasks = {};
 
 function add(clsNames, modName) {
   const modClass = require('./' + modName);
   clsNames.forEach((clsName) => {
-    services[clsName] = {
+    tasks[clsName] = {
       'clsName': clsName,
       'modName': modName,
       'class': modClass
@@ -15,7 +15,7 @@ function init() {
 }
 
 function create(name, session) {
-  const module = services[name];
+  const module = tasks[name];
   return new module['class'](session);
 }