diff --git a/package-lock.json b/package-lock.json
index 3a37ce0..9e61407 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -732,6 +732,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "3.2.2",
             "longest": "1.0.1",
@@ -1674,7 +1675,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "lru-cache": {
           "version": "4.1.3",