diff --git a/package-lock.json b/package-lock.json
index 33f814b..7612987 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -391,7 +391,8 @@
       "version": "1.1.0",
       "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
     },
     "color-convert": {
       "version": "1.9.3",
@@ -418,7 +419,8 @@
       "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
     },
     "content-type": {
       "version": "1.0.4",
@@ -639,6 +641,7 @@
       "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
       "integrity": "sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==",
       "dev": true,
+      "optional": true,
       "requires": {
         "once": "^1.4.0"
       }
@@ -1256,6 +1259,7 @@
       "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": "^1.0.0"
       }
@@ -2219,6 +2223,7 @@
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
       "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
       "dev": true,
+      "optional": true,
       "requires": {
         "code-point-at": "^1.0.0",
         "is-fullwidth-code-point": "^1.0.0",
@@ -2741,9 +2746,9 @@
       }
     },
     "ws": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
-      "integrity": "sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==",
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.2.tgz",
+      "integrity": "sha512-zmhltoSR8u1cnDsD43TX59mzoMZsLKqUweyYBAIvTngR3shc0W6aOZylZmq/7hqyVxPdi+5Ud2QInblgyE72fw==",
       "dev": true,
       "requires": {
         "async-limiter": "~1.0.0"
@@ -2809,4 +2814,4 @@
       }
     }
   }
-}
\ No newline at end of file
+}