diff --git a/JS/koa/exer-1/yarn.lock b/JS/koa/exer-1/yarn.lock
index 9a319dc..2ac8d37 100644
--- a/JS/koa/exer-1/yarn.lock
+++ b/JS/koa/exer-1/yarn.lock
@@ -1106,8 +1106,8 @@ punycode@^1.4.1:
   resolved "http://registry.npm.taobao.org/punycode/download/punycode-1.4.1.tgz#c0d5a63b2718800ad8e1eb0fa5269c84dd41845e"
 
 qs@~6.4.0:
-  version "6.4.0"
-  resolved "http://registry.npm.taobao.org/qs/download/qs-6.4.0.tgz#13e26d28ad6b0ffaa91312cd3bf708ed351e7233"
+  version "6.4.1"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.4.1.tgz#2bad97710a5b661c366b378b1e3a44a592ff45e6"
 
 randomatic@^1.1.3:
   version "1.1.7"