diff --git a/packages/koa-better-body/package.json b/packages/koa-better-body/package.json
index 6dd837cb..10892863 100644
--- a/packages/koa-better-body/package.json
+++ b/packages/koa-better-body/package.json
@@ -57,7 +57,7 @@
     "is-buffer": "2.0.3",
     "koa": "1.6.2",
     "koa-route": "3.2.0",
-    "qs": "6.8.0",
+    "qs": "6.9.1",
     "supertest": "4.0.2"
   },
   "publishConfig": {
diff --git a/yarn.lock b/yarn.lock
index bd278a6f..0554ac24 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -12600,12 +12600,7 @@ q@^1.5.1:
   resolved "https://registry.yarnpkg.com/q/-/q-1.5.1.tgz#7e32f75b41381291d04611f1bf14109ac00651d7"
   integrity sha1-fjL3W0E4EpHQRhHxvxQQmsAGUdc=
 
-qs@6.8.0:
-  version "6.8.0"
-  resolved "https://registry.yarnpkg.com/qs/-/qs-6.8.0.tgz#87b763f0d37ca54200334cd57bb2ef8f68a1d081"
-  integrity sha512-tPSkj8y92PfZVbinY1n84i1Qdx75lZjMQYx9WZhnkofyxzw2r7Ho39G3/aEvSUdebxpnnM4LZJCtvE/Aq3+s9w==
-
-qs@^6.5.1:
+qs@6.9.1, qs@^6.5.1:
   version "6.9.1"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.9.1.tgz#20082c65cb78223635ab1a9eaca8875a29bf8ec9"
   integrity sha512-Cxm7/SS/y/Z3MHWSxXb8lIFqgqBowP5JMlTUFyJN88y0SGQhVmZnqFK/PeuMX9LzUyWsqqhNxIyg0jlzq946yA==