diff --git a/backend/yarn.lock b/backend/yarn.lock
index 5f0cfd8..a687f30 100644
--- a/backend/yarn.lock
+++ b/backend/yarn.lock
@@ -51,9 +51,9 @@ bluebird@3.5.1:
   integrity sha1-2VUfnemPH82h5oPRfukaBgLuLrk=
 
 bson@^1.1.0, bson@~1.1.0:
-  version "1.1.0"
-  resolved "http://registry.npm.taobao.org/bson/download/bson-1.1.0.tgz#bee57d1fb6a87713471af4e32bcae36de814b5b0"
-  integrity sha1-vuV9H7aodxNHGvTjK8rjbegUtbA=
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/bson/-/bson-1.1.6.tgz#fb819be9a60cd677e0853aee4ca712a785d6618a"
+  integrity sha512-EvVNVeGo4tHxwi8L6bPj3y3itEvStdwvvlojVxxbyYfoaxJ6keLgrTuKdyfEAszFK+H3olzBuafE0yoh0D1gdg==
 
 buffer-equal-constant-time@1.0.1:
   version "1.0.1"