diff --git a/yarn.lock b/yarn.lock
index f2da950..aa0447e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -116,9 +116,9 @@ body-parser@1.18.3:
     type-is "~1.6.16"
 
 bson@^1.1.0, bson@~1.1.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/bson/-/bson-1.1.1.tgz#4330f5e99104c4e751e7351859e2d408279f2f13"
-  integrity sha512-jCGVYLoYMHDkOsbwJZBCqwMHyH4c+wzgI9hG7Z6SZJRXWr+x58pdIbm2i9a/jFGCkRJqRUr8eoI7lDWa0hTkxg==
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/bson/-/bson-1.1.6.tgz#fb819be9a60cd677e0853aee4ca712a785d6618a"
+  integrity sha512-EvVNVeGo4tHxwi8L6bPj3y3itEvStdwvvlojVxxbyYfoaxJ6keLgrTuKdyfEAszFK+H3olzBuafE0yoh0D1gdg==
 
 bytes@3.0.0:
   version "3.0.0"
@@ -162,6 +162,14 @@ core-util-is@1.0.2, core-util-is@~1.0.0:
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
   integrity sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=
 
+cors@^2.8.5:
+  version "2.8.5"
+  resolved "https://registry.yarnpkg.com/cors/-/cors-2.8.5.tgz#eac11da51592dd86b9f06f6e7ac293b3df875d29"
+  integrity sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==
+  dependencies:
+    object-assign "^4"
+    vary "^1"
+
 cryptr@^4.0.2:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/cryptr/-/cryptr-4.0.2.tgz#8a93b5ca7667d1a6131e396bab23a134ff1f5dc6"
@@ -703,6 +711,11 @@ oauth-sign@~0.9.0:
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.9.0.tgz#47a7b016baa68b5fa0ecf3dee08a85c679ac6455"
   integrity sha512-fexhUFFPTGV8ybAtSIGbV6gOkSv8UtRbDBnAyLQw4QPKkgNlsH2ByPGtMUqdWkos6YCRmAqViwgZrJc/mRDzZQ==
 
+object-assign@^4:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
+  integrity sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=
+
 object-keys@^1.0.12:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.1.0.tgz#11bd22348dd2e096a045ab06f6c85bcc340fa032"
@@ -1040,7 +1053,7 @@ uuid@^3.3.2:
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
   integrity sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==
 
-vary@~1.1.2:
+vary@^1, vary@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
   integrity sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=