diff --git a/package.json b/package.json
index 02233907..e1b18c3d 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "private": true,
   "license": "Apache-2.0",
   "dependencies": {
+    "@mapbox/polyline": "^1.0.0",
     "array-includes": "^3.0.3",
     "array.prototype.find": "^2.0.4",
     "autosize": "^4.0.0",
diff --git a/yarn.lock b/yarn.lock
index 329a764c..ce2e37b8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,6 +2,10 @@
 # yarn lockfile v1
 
 
+"@mapbox/polyline@^1.0.0":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@mapbox/polyline/-/polyline-1.0.0.tgz#b6f1c3cf61f8dddcf9ac6dce0b2e50e5f4e965bc"
+
 "@types/node@*":
   version "9.6.0"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-9.6.0.tgz#d3480ee666df9784b1001a1872a2f6ccefb6c2d7"