diff --git a/package.json b/package.json
index f83facd5..2a939edf 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
   "author": "",
   "license": "MIT",
   "dependencies": {
+    "ally.js": "^1.4.1",
     "autoprefixer": "^9.1.3",
     "babel-polyfill": "^6.26.0",
     "date-fns": "^1.29.0",
diff --git a/yarn.lock b/yarn.lock
index 92981887..965179de 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -86,6 +86,14 @@ ajv@^5.1.0:
     fast-json-stable-stringify "^2.0.0"
     json-schema-traverse "^0.3.0"
 
+ally.js@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/ally.js/-/ally.js-1.4.1.tgz#9fb7e6ba58efac4ee9131cb29aa9ee3b540bcf1e"
+  integrity sha1-n7fmuljvrE7pExyymqnuO1QLzx4=
+  dependencies:
+    css.escape "^1.5.0"
+    platform "1.3.3"
+
 alphanum-sort@^1.0.0, alphanum-sort@^1.0.1, alphanum-sort@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/alphanum-sort/-/alphanum-sort-1.0.2.tgz#97a1119649b211ad33691d9f9f486a8ec9fbe0a3"
@@ -1927,6 +1935,11 @@ css-what@2.1:
   resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.0.tgz#9467d032c38cfaefb9f2d79501253062f87fa1bd"
   integrity sha1-lGfQMsOM+u+58teVASUwYvh/ob0=
 
+css.escape@^1.5.0:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/css.escape/-/css.escape-1.5.1.tgz#42e27d4fa04ae32f931a4b4d4191fa9cddee97cb"
+  integrity sha1-QuJ9T6BK4y+TGktNQZH6nN3ul8s=
+
 cssnano-preset-default@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/cssnano-preset-default/-/cssnano-preset-default-4.0.0.tgz#c334287b4f7d49fb2d170a92f9214655788e3b6b"
@@ -5352,6 +5365,11 @@ pinkie@^2.0.0:
   resolved "https://registry.yarnpkg.com/pinkie/-/pinkie-2.0.4.tgz#72556b80cfa0d48a974e80e77248e80ed4f7f870"
   integrity sha1-clVrgM+g1IqXToDnckjoDtT3+HA=
 
+platform@1.3.3:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/platform/-/platform-1.3.3.tgz#646c77011899870b6a0903e75e997e8e51da7461"
+  integrity sha1-ZGx3ARiZhwtqCQPnXpl+jlHadGE=
+
 popper.js@^1.12.9:
   version "1.14.4"
   resolved "https://registry.yarnpkg.com/popper.js/-/popper.js-1.14.4.tgz#8eec1d8ff02a5a3a152dd43414a15c7b79fd69b6"