diff --git a/package-lock.json b/package-lock.json
index bb2f342..4fa9d60 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3370,7 +3370,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -3785,7 +3786,8 @@
         "safe-buffer": {
           "version": "5.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -3841,6 +3843,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -3884,12 +3887,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -9078,9 +9083,9 @@
       }
     },
     "terser": {
-      "version": "4.6.6",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-4.6.6.tgz",
-      "integrity": "sha512-4lYPyeNmstjIIESr/ysHg2vUPRGf2tzF9z2yYwnowXVuVzLEamPN1Gfrz7f8I9uEPuHcbFlW4PLIAsJoxXyJ1g==",
+      "version": "4.8.1",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-4.8.1.tgz",
+      "integrity": "sha512-4GnLC0x667eJG0ewJTa6z/yXrbLGv80D9Ru6HIpCQmO+Q4PfEtBFi0ObSckqwL6VyQv/7ENJieXHo2ANmdQwgw==",
       "dev": true,
       "requires": {
         "commander": "^2.20.0",