diff --git a/yarn.lock b/yarn.lock
index 4601cd467b..4f342df7da 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11371,9 +11371,8 @@ nan@2.10.0, nan@>=2.5.1, nan@^2.0.8, nan@^2.2.1, nan@^2.3.0, nan@^2.3.3, nan@^2.
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
 
 nan@^2.11.0:
-  version "2.13.1"
-  resolved "https://registry.npmjs.org/nan/-/nan-2.13.1.tgz#a15bee3790bde247e8f38f1d446edcdaeb05f2dd"
-  integrity sha512-I6YB/YEuDeUZMmhscXKxGgZlFnhsn5y0hgOZBadkzfTRrZBtJDZeg6eQf7PYMIEclwmorTKK8GztsyOUSVBREA==
+  version "2.12.1"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.12.1.tgz#7b1aa193e9aa86057e3c7bbd0ac448e770925552"
 
 nano-json-stream-parser@^0.1.2:
   version "0.1.2"
@@ -13507,15 +13506,6 @@ react-dom@^16.3.2:
     object-assign "^4.1.1"
     prop-types "^15.6.0"
 
-react-dom@^16.4.2:
-  version "16.8.4"
-  resolved "https://registry.npmjs.org/react-dom/-/react-dom-16.8.4.tgz#1061a8e01a2b3b0c8160037441c3bf00a0e3bc48"
-  dependencies:
-    loose-envify "^1.1.0"
-    object-assign "^4.1.1"
-    prop-types "^15.6.2"
-    scheduler "^0.13.4"
-
 react-dom@^16.5.2:
   version "16.5.2"
   resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.5.2.tgz#b69ee47aa20bab5327b2b9d7c1fe2a30f2cfa9d7"
@@ -13573,6 +13563,8 @@ react-highlight@0xproject/react-highlight#react-peer-deps:
   dependencies:
     highlight.js "^9.11.0"
     highlightjs-solidity "^1.0.5"
+    react "^16.4.2"
+    react-dom "^16.4.2"
 
 react-hot-loader@^4.3.3:
   version "4.3.4"
@@ -13817,15 +13809,6 @@ react@^16.3.2:
     object-assign "^4.1.1"
     prop-types "^15.6.0"
 
-react@^16.4.2:
-  version "16.8.4"
-  resolved "https://registry.npmjs.org/react/-/react-16.8.4.tgz#fdf7bd9ae53f03a9c4cd1a371432c206be1c4768"
-  dependencies:
-    loose-envify "^1.1.0"
-    object-assign "^4.1.1"
-    prop-types "^15.6.2"
-    scheduler "^0.13.4"
-
 react@^16.5.2:
   version "16.5.2"
   resolved "https://registry.yarnpkg.com/react/-/react-16.5.2.tgz#19f6b444ed139baa45609eee6dc3d318b3895d42"
@@ -14697,13 +14680,6 @@ schedule@^0.5.0:
   dependencies:
     object-assign "^4.1.1"
 
-scheduler@^0.13.4:
-  version "0.13.4"
-  resolved "https://registry.npmjs.org/scheduler/-/scheduler-0.13.4.tgz#8fef05e7a3580c76c0364d2df5e550e4c9140298"
-  dependencies:
-    loose-envify "^1.1.0"
-    object-assign "^4.1.1"
-
 schema-utils@^0.4.4:
   version "0.4.7"
   resolved "https://registry.npmjs.org/schema-utils/-/schema-utils-0.4.7.tgz#ba74f597d2be2ea880131746ee17d0a093c68187"
@@ -17678,8 +17654,7 @@ websocket@1.0.26:
 
 websocket@^1.0.26:
   version "1.0.28"
-  resolved "https://registry.npmjs.org/websocket/-/websocket-1.0.28.tgz#9e5f6fdc8a3fe01d4422647ef93abdd8d45a78d3"
-  integrity sha512-00y/20/80P7H4bCYkzuuvvfDvh+dgtXi5kzDf3UcZwN6boTYaKvsrtZ5lIYm1Gsg48siMErd9M4zjSYfYFHTrA==
+  resolved "https://registry.yarnpkg.com/websocket/-/websocket-1.0.28.tgz#9e5f6fdc8a3fe01d4422647ef93abdd8d45a78d3"
   dependencies:
     debug "^2.2.0"
     nan "^2.11.0"