diff --git a/package-lock.json b/package-lock.json
index 939294f..fa2fc17 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1379,7 +1379,8 @@
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       "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
       "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "collection-visit": {
       "version": "1.0.0",
@@ -1502,7 +1503,8 @@
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
       "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "constants-browserify": {
       "version": "1.0.0",
@@ -1666,7 +1668,7 @@
     "css-what": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/css-what/-/css-what-2.1.0.tgz",
-      "integrity": "sha1-lGfQMsOM+u+58teVASUwYvh/ob0=",
+      "integrity": "sha512-HtdI8TqiYjVrBI0C2VLF8fwphIa49EaHPVo64hrX+QHCPBtjp2FW1g4+jNeC6v7bBSr2z7v2USnQ6GU+VPOzgQ==",
       "dev": true
     },
     "cssnano": {
@@ -3581,6 +3583,7 @@
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
       "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
       "dev": true,
+      "optional": true,
       "requires": {
         "number-is-nan": "1.0.1"
       }
@@ -3967,6 +3970,7 @@
       "resolved": "https://registry.npmjs.org/minipass/-/minipass-2.2.4.tgz",
       "integrity": "sha512-hzXIWWet/BzWhYs2b+u7dRHlruXhwdgvlTMDKC6Cb1U7ps6Ac6yQlR39xsbjWJE377YTCtKwIXIpJ5oP+j5y8g==",
       "dev": true,
+      "optional": true,
       "requires": {
         "safe-buffer": "5.1.1",
         "yallist": "3.0.2"
@@ -6628,6 +6632,7 @@
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
       "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
       "dev": true,
+      "optional": true,
       "requires": {
         "code-point-at": "1.1.0",
         "is-fullwidth-code-point": "1.0.0",
@@ -7117,7 +7122,8 @@
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.2.tgz",
       "integrity": "sha1-hFK0u36Dx8GI2AQcGoN8dz1ti7k=",
-      "dev": true
+      "dev": true,
+      "optional": true
     }
   }
 }