diff --git a/app/controllers/wechats/js_sdk_signatures_controller.rb b/app/controllers/wechats/js_sdk_signatures_controller.rb
index 6d7b3d87d..0b66cc263 100644
--- a/app/controllers/wechats/js_sdk_signatures_controller.rb
+++ b/app/controllers/wechats/js_sdk_signatures_controller.rb
@@ -1,6 +1,6 @@
 class Wechats::JsSdkSignaturesController < ApplicationController
   def create
-    timestamp = (Time.now.to_f * 1000).to_i
+    timestamp = Time.now.to_i
     noncestr = ('A'..'z').to_a.sample(8).join
     signature = Util::Wechat.js_sdk_signature(params[:url], noncestr, timestamp)