diff --git a/yarn.lock b/yarn.lock
index 1249e88..d7cc3d8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1188,8 +1188,8 @@ css-select@~1.2.0:
     nth-check "~1.0.1"
 
 css-what@2.1:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.0.tgz#9467d032c38cfaefb9f2d79501253062f87fa1bd"
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.3.tgz#a6d7604573365fe74686c3f311c56513d88285f2"
 
 cssom@0.3.x, "cssom@>= 0.3.2 < 0.4.0":
   version "0.3.2"
@@ -1887,7 +1887,7 @@ hawk@~3.1.3:
     hoek "2.x.x"
     sntp "1.x.x"
 
-history@^4.6.1:
+history@4.6.1:
   version "4.6.1"
   resolved "https://registry.yarnpkg.com/history/-/history-4.6.1.tgz#911cf8eb65728555a94f2b12780a0c531a14d2fd"
   dependencies:
@@ -2644,7 +2644,7 @@ longest@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/longest/-/longest-1.0.1.tgz#30a0b2da38f73770e8294a0d22e6625ed77d0097"
 
-loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.2.0, loose-envify@^1.3.1:
+loose-envify@^1.0.0, loose-envify@^1.2.0, loose-envify@^1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.3.1.tgz#d1a8ad33fa9ce0e713d65fdd0ac8b748d478c848"
   dependencies:
@@ -3068,15 +3068,6 @@ rc@^1.1.7:
     minimist "^1.2.0"
     strip-json-comments "~2.0.1"
 
-react-dom@^15.6.1:
-  version "15.6.1"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-15.6.1.tgz#2cb0ed4191038e53c209eb3a79a23e2a4cf99470"
-  dependencies:
-    fbjs "^0.8.9"
-    loose-envify "^1.1.0"
-    object-assign "^4.1.0"
-    prop-types "^15.5.10"
-
 react-test-renderer@^15.6.1:
   version "15.6.1"
   resolved "https://registry.yarnpkg.com/react-test-renderer/-/react-test-renderer-15.6.1.tgz#026f4a5bb5552661fd2cc4bbcd0d4bc8a35ebf7e"