diff --git a/package-lock.json b/package-lock.json
index 0fad2df..1434d4e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2,7 +2,6 @@
   "name": "travis-ci-demo",
   "version": "1.0.0",
   "lockfileVersion": 1,
-  "preserveSymlinks": "1",
   "requires": true,
   "dependencies": {
     "@babel/code-frame": {
@@ -2556,9 +2555,9 @@
       "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
     },
     "mixin-deep": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/mixin-deep/-/mixin-deep-1.3.1.tgz",
-      "integrity": "sha512-8ZItLHeEgaqEvd5lYBXfm4EZSFCX29Jb9K+lAHhDKzReKBQKj3R+7NOF6tjqYi9t4oI8VUfaWITJQm86wnXGNQ==",
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/mixin-deep/-/mixin-deep-1.3.2.tgz",
+      "integrity": "sha512-WRoDn//mXBiJ1H40rqa3vH0toePwSsGb45iInWlTySa+Uu4k3tYUSxa2v1KqAiLtvlrSzaExqS1gtk96A9zvEA==",
       "requires": {
         "for-in": "^1.0.2",
         "is-extendable": "^1.0.1"