diff --git a/yarn.lock b/yarn.lock
index e0c962b..84430b7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -538,10 +538,6 @@ esprima@2.7.x, esprima@^2.6.0, esprima@^2.7.1:
   version "2.7.3"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
 
-esprima@^3.1.1:
-  version "3.1.3"
-  resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
-
 esrecurse@^4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/esrecurse/-/esrecurse-4.1.0.tgz#4713b6536adf7f2ac4f327d559e7756bff648220"
@@ -961,20 +957,13 @@ js-tokens@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.1.tgz#08e9f132484a2c45a30907e9dc4d5567b7f114d7"
 
-js-yaml@3.6.1:
+js-yaml@3.6.1, js-yaml@3.x, js-yaml@^3.5.1:
   version "3.6.1"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.6.1.tgz#6e5fe67d8b205ce4d22fad05b7781e8dadcc4b30"
   dependencies:
     argparse "^1.0.7"
     esprima "^2.6.0"
 
-js-yaml@3.x, js-yaml@^3.5.1:
-  version "3.8.1"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.8.1.tgz#782ba50200be7b9e5a8537001b7804db3ad02628"
-  dependencies:
-    argparse "^1.0.7"
-    esprima "^3.1.1"
-
 jsbn@~0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
@@ -1298,11 +1287,11 @@ qs@6.2.0:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.2.0.tgz#3b7848c03c2dece69a9522b0fae8c4126d745f3b"
 
-qs@6.2.1, qs@^6.1.0:
+qs@6.2.1:
   version "6.2.1"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.2.1.tgz#ce03c5ff0935bc1d9d69a9f14cbd18e568d67625"
 
-qs@~6.3.0:
+qs@^6.1.0, qs@~6.3.0:
   version "6.3.1"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.3.1.tgz#918c0b3bcd36679772baf135b1acb4c1651ed79d"