diff --git a/package.json b/package.json
index 231fc31..cbca146 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "dependencies": {
     "grunt": "~1.0.1",
     "grunt-contrib-cssmin": "~2.2.1",
-    "grunt-contrib-uglify": "~3.1.0",
+    "grunt-contrib-uglify": "~3.2.1",
     "grunt-potomo": "~3.5.0",
     "open-sans-fontface": "~1.4.0"
   },
diff --git a/yarn.lock b/yarn.lock
index 3ddb557..699eb1b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -269,9 +269,9 @@ combined-stream@^1.0.5, combined-stream@~1.0.5:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@~2.11.0:
-  version "2.11.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.11.0.tgz#157152fd1e7a6c8d98a5b715cf376df928004563"
+commander@~2.12.1:
+  version "2.12.2"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.12.2.tgz#0f5946c427ed9ec0d91a46bb9def53e54650e555"
 
 compress-commons@^1.2.0:
   version "1.2.2"
@@ -640,13 +640,13 @@ grunt-contrib-cssmin@~2.2.1:
     clean-css "~4.1.1"
     maxmin "^2.1.0"
 
-grunt-contrib-uglify@~3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/grunt-contrib-uglify/-/grunt-contrib-uglify-3.1.0.tgz#10d1e4849210ec92bf0b08247e24186354d5e9ee"
+grunt-contrib-uglify@~3.2.1:
+  version "3.2.1"
+  resolved "https://registry.yarnpkg.com/grunt-contrib-uglify/-/grunt-contrib-uglify-3.2.1.tgz#8458943eb6053badff829b6f0c9126b1ea624c4a"
   dependencies:
     chalk "^1.0.0"
     maxmin "^1.1.0"
-    uglify-js "~3.0.4"
+    uglify-js "~3.2.0"
     uri-path "^1.0.0"
 
 grunt-contrib-watch@~1.0.0:
@@ -1494,10 +1494,14 @@ sntp@2.x.x:
   dependencies:
     hoek "4.x.x"
 
-source-map@0.5.x, source-map@~0.5.1:
+source-map@0.5.x:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
 
+source-map@~0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+
 spdx-correct@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-1.0.2.tgz#4b3073d933ff51f3912f03ac5519498a4150db40"
@@ -1662,12 +1666,12 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-uglify-js@~3.0.4:
-  version "3.0.28"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.0.28.tgz#96b8495f0272944787b5843a1679aa326640d5f7"
+uglify-js@~3.2.0:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.2.2.tgz#870e4b34ed733d179284f9998efd3293f7fd73f6"
   dependencies:
-    commander "~2.11.0"
-    source-map "~0.5.1"
+    commander "~2.12.1"
+    source-map "~0.6.1"
 
 underscore.string@~3.2.3:
   version "3.2.3"