diff --git a/client/package.json b/client/package.json
index 78c2491dd..c2aadb18d 100644
--- a/client/package.json
+++ b/client/package.json
@@ -57,6 +57,7 @@
     "classnames": "^2.2.5",
     "css-loader": "^0.26.0",
     "es5-shim": "^4.5.9",
+    "estraverse": "^4.2.0",
     "expose-loader": "^0.7.3",
     "extract-text-webpack-plugin": "^2.0.0",
     "file-loader": "^0.9.0",
@@ -68,7 +69,7 @@
     "loader-utils": "^0.2.16",
     "lodash": "^4.17.2",
     "marked": "^0.3.6",
-    "node-sass": "^3.13.0",
+    "node-sass": "^4.5.2",
     "node-uuid": "^1.4.7",
     "postcss-loader": "^1.1.1",
     "react": "^15.4.1",
diff --git a/client/yarn.lock b/client/yarn.lock
index d28bc02ca..0212b9de8 100644
--- a/client/yarn.lock
+++ b/client/yarn.lock
@@ -3475,6 +3475,10 @@ lodash.memoize@^4.1.0:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/lodash.memoize/-/lodash.memoize-4.1.2.tgz#bcc6c49a42a2840ed997f323eada5ecd182e0bfe"
 
+lodash.mergewith@^4.6.0:
+  version "4.6.0"
+  resolved "https://registry.yarnpkg.com/lodash.mergewith/-/lodash.mergewith-4.6.0.tgz#150cf0a16791f5903b8891eab154609274bdea55"
+
 lodash.restparam@^3.0.0:
   version "3.6.1"
   resolved "https://registry.yarnpkg.com/lodash.restparam/-/lodash.restparam-3.6.1.tgz#936a4e309ef330a7645ed4145986c85ae5b20805"
@@ -3788,9 +3792,9 @@ node-pre-gyp@^0.6.29:
     tar "^2.2.1"
     tar-pack "^3.4.0"
 
-node-sass@^3.13.0:
-  version "3.13.1"
-  resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-3.13.1.tgz#7240fbbff2396304b4223527ed3020589c004fc2"
+node-sass@^4.5.2:
+  version "4.5.2"
+  resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-4.5.2.tgz#4012fa2bd129b1d6365117e88d9da0500d99da64"
   dependencies:
     async-foreach "^0.1.3"
     chalk "^1.1.1"
@@ -3801,13 +3805,15 @@ node-sass@^3.13.0:
     in-publish "^2.0.0"
     lodash.assign "^4.2.0"
     lodash.clonedeep "^4.3.2"
+    lodash.mergewith "^4.6.0"
     meow "^3.7.0"
     mkdirp "^0.5.1"
     nan "^2.3.2"
     node-gyp "^3.3.1"
     npmlog "^4.0.0"
-    request "^2.61.0"
+    request "^2.79.0"
     sass-graph "^2.1.1"
+    stdout-stream "^1.4.0"
 
 node-uuid@^1.4.7:
   version "1.4.8"
@@ -4861,7 +4867,7 @@ repeating@^2.0.0:
   dependencies:
     is-finite "^1.0.0"
 
-request@2, request@^2.61.0, request@^2.79.0, request@^2.81.0:
+request@2, request@^2.79.0, request@^2.81.0:
   version "2.81.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.81.0.tgz#c6928946a0e06c5f8d6f8a9333469ffda46298a0"
   dependencies:
@@ -5262,6 +5268,12 @@ sshpk@^1.7.0:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.3.1.tgz#faf51b9eb74aaef3b3acf4ad5f61abf24cb7b93e"
 
+stdout-stream@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/stdout-stream/-/stdout-stream-1.4.0.tgz#a2c7c8587e54d9427ea9edb3ac3f2cd522df378b"
+  dependencies:
+    readable-stream "^2.0.1"
+
 stream-browserify@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/stream-browserify/-/stream-browserify-2.0.1.tgz#66266ee5f9bdb9940a4e4514cafb43bb71e5c9db"