diff --git a/package-lock.json b/package-lock.json
index bf27072..9bc6b3e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9413,21 +9413,12 @@
       "dev": true
     },
     "uglify-js": {
-      "version": "3.8.1",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.8.1.tgz",
-      "integrity": "sha512-W7KxyzeaQmZvUFbGj4+YFshhVrMBGSg2IbcYAjGWGvx8DHvJMclbTDMpffdxFUGPBHjIytk7KJUR/KUXstUGDw==",
+      "version": "3.9.0",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.9.0.tgz",
+      "integrity": "sha512-j5wNQBWaql8gr06dOUrfaohHlscboQZ9B8sNsoK5o4sBjm7Ht9dxSbrMXyktQpA16Acaij8AcoozteaPYZON0g==",
       "dev": true,
       "requires": {
-        "commander": "~2.20.3",
-        "source-map": "~0.6.1"
-      },
-      "dependencies": {
-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
-        }
+        "commander": "~2.20.3"
       }
     },
     "unc-path-regex": {