diff --git a/package-lock.json b/package-lock.json
index 6091af8..8b588ce 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -51,7 +51,8 @@
     "acorn": {
       "version": "2.7.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
-      "integrity": "sha1-q259nYhqrKiwhbwzEreaGYQz8Oc="
+      "integrity": "sha1-q259nYhqrKiwhbwzEreaGYQz8Oc=",
+      "optional": true
     },
     "acorn-globals": {
       "version": "1.0.9",
@@ -693,7 +694,7 @@
     "cookiejar": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.1.tgz",
-      "integrity": "sha1-Qa1XsbVVlR7BcUEqgZQrHoIA00o="
+      "integrity": "sha512-hlWcCbN6fF2cu3hQzCWeRfkXLtMB7cNAsqWZ66cU9b3WUtvEA/v9fmUXU/O3FduAX+pnBeQTdzlRBC58cwyQQQ=="
     },
     "copy-descriptor": {
       "version": "0.1.1",
@@ -774,7 +775,8 @@
     "cssom": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.2.tgz",
-      "integrity": "sha1-uANhcMefB6kP8vFuIihAJ6JDhIs="
+      "integrity": "sha1-uANhcMefB6kP8vFuIihAJ6JDhIs=",
+      "optional": true
     },
     "cssstyle": {
       "version": "0.2.37",
@@ -2661,7 +2663,8 @@
     "prelude-ls": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",
-      "integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ="
+      "integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=",
+      "optional": true
     },
     "prepend-http": {
       "version": "1.0.4",
@@ -4461,6 +4464,7 @@
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
       "integrity": "sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=",
+      "optional": true,
       "requires": {
         "prelude-ls": "1.1.2"
       }