diff --git a/app/controllers/wechats_controller.rb b/app/controllers/wechats_controller.rb
index ed890d1e1..8863043a5 100644
--- a/app/controllers/wechats_controller.rb
+++ b/app/controllers/wechats_controller.rb
@@ -211,13 +211,6 @@ class WechatsController < ActionController::Base
     render 'wechats/login', layout: 'base_wechat'
   end
 
-  def get_openid
-    code = params[:code]
-    openid = get_openid_from_code(code)
-    render :text => {openid: openid}.to_json
-  end
-
-
   private
   def get_openid_from_code(code)
     url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=#{Wechat.config.appid}&secret=#{Wechat.config.secret}&code=#{code}&grant_type=authorization_code"
diff --git a/config/routes.rb b/config/routes.rb
index 2313088cc..327c6af8d 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1165,7 +1165,7 @@ RedmineApp::Application.routes.draw do
     collection do
       get :login
       post :bind
-      get :get_open_id
+      post :get_open_id
     end
   end
 
diff --git a/public/javascripts/wechat/auth.js b/public/javascripts/wechat/auth.js
index 44c90c836..e2f8424d4 100644
--- a/public/javascripts/wechat/auth.js
+++ b/public/javascripts/wechat/auth.js
@@ -20,8 +20,9 @@ $(function(){
         }
         var code = getUrlParam("code");
         $.ajax({
-            url: '/wechat/get_open_id?code='+code,
-            type: 'get',
+            url: '/wechat/get_open_id',
+            data: {code: code},
+            type: 'post',
             dataType: 'json',
             success: function(data){
                 g_openid = data.openid;