diff --git a/package.json b/package.json
index c5314ba..d26d7fa 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   "dependencies": {
     "d3": "^3.5.17",
     "es6-promise": "^3.2.1",
-    "lodash": "^4.13.1",
+    "lodash": "^4.18.1",
     "mark.js": "^8.11.1",
     "mustache": "^2.2.1",
     "normalize.css": "3.0.3",
diff --git a/yarn.lock b/yarn.lock
index 6243ae5..4a74557 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -24,10 +24,10 @@ es6-promise@^3.2.1:
   resolved "https://registry.npmjs.org/es6-promise/-/es6-promise-3.3.1.tgz"
   integrity sha512-SOp9Phqvqn7jtEUxPWdWfWoLmyt2VaJ6MpvP9Comy1MceMXqE6bxvaTu4iaxpYYPzhny28Lc+M87/c2cPK6lDg==
 
-lodash@^4.13.1:
-  version "4.17.21"
-  resolved "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz"
-  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
+lodash@^4.18.1:
+  version "4.18.1"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.18.1.tgz#ff2b66c1f6326d59513de2407bf881439812771c"
+  integrity sha512-dMInicTPVE8d1e5otfwmmjlxkZoUpiVLwyeTdUsi/Caj/gfzzblBcCE5sRHV/AsjuCmxWrte2TNGSYuCeCq+0Q==
 
 mark.js@^8.11.1:
   version "8.11.1"