diff --git a/package-lock.json b/package-lock.json
index ee4fd50..21b2c16 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -69,6 +69,7 @@
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
+      "optional": true,
       "requires": {
         "kind-of": "^3.0.2",
         "longest": "^1.0.1",
@@ -1493,7 +1494,8 @@
     "is-buffer": {
       "version": "1.1.6",
       "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.6.tgz",
-      "integrity": "sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w=="
+      "integrity": "sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==",
+      "optional": true
     },
     "is-fullwidth-code-point": {
       "version": "2.0.0",
@@ -1557,9 +1559,9 @@
       "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls="
     },
     "js-yaml": {
-      "version": "3.10.0",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.10.0.tgz",
-      "integrity": "sha512-O2v52ffjLa9VeM43J4XocZE//WT9N0IiwDa3KSHH7Tu8CtH+1qM8SIZvnsTh6v+4yFy5KUY3BHUVwjpfAWsjIA==",
+      "version": "3.13.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
+      "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
       "requires": {
         "argparse": "^1.0.7",
         "esprima": "^4.0.0"
@@ -1624,6 +1626,7 @@
       "version": "3.2.2",
       "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
       "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+      "optional": true,
       "requires": {
         "is-buffer": "^1.1.5"
       }
@@ -1661,7 +1664,8 @@
     "longest": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
-      "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc="
+      "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
+      "optional": true
     },
     "lru-cache": {
       "version": "4.1.1",
@@ -2094,7 +2098,8 @@
     "repeat-string": {
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/repeat-string/-/repeat-string-1.6.1.tgz",
-      "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc="
+      "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc=",
+      "optional": true
     },
     "request": {
       "version": "2.83.0",