diff --git a/package-lock.json b/package-lock.json
index 28fa84c..06e88dc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -215,7 +215,6 @@
       "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz",
       "integrity": "sha1-Y7xdy2EzG5K8Bf1SiVPDNGKgb40=",
       "dev": true,
-      "optional": true,
       "requires": {
         "tweetnacl": "^0.14.3"
       }
@@ -707,7 +706,6 @@
       "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
       "integrity": "sha1-D8c6ntXw1Tw4GTOYUj735UN3dQU=",
       "dev": true,
-      "optional": true,
       "requires": {
         "jsbn": "~0.1.0"
       }
@@ -1191,9 +1189,7 @@
         },
         "asn1": {
           "version": "0.2.3",
-          "bundled": true,
-          "dev": true,
-          "optional": true
+          "bundled": true
         },
         "assert-plus": {
           "version": "0.2.0",
@@ -1228,8 +1224,6 @@
         "bcrypt-pbkdf": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true,
-          "optional": true,
           "requires": {
             "tweetnacl": "^0.14.3"
           }
@@ -1325,8 +1319,6 @@
         "dashdash": {
           "version": "1.14.1",
           "bundled": true,
-          "dev": true,
-          "optional": true,
           "requires": {
             "assert-plus": "^1.0.0"
           },
@@ -1334,7 +1326,6 @@
             "assert-plus": {
               "version": "1.0.0",
               "bundled": true,
-              "dev": true,
               "optional": true
             }
           }
@@ -1369,8 +1360,6 @@
         "ecc-jsbn": {
           "version": "0.1.1",
           "bundled": true,
-          "dev": true,
-          "optional": true,
           "requires": {
             "jsbn": "~0.1.0"
           }
@@ -1452,8 +1441,6 @@
         "getpass": {
           "version": "0.1.7",
           "bundled": true,
-          "dev": true,
-          "optional": true,
           "requires": {
             "assert-plus": "^1.0.0"
           },
@@ -1461,7 +1448,6 @@
             "assert-plus": {
               "version": "1.0.0",
               "bundled": true,
-              "dev": true,
               "optional": true
             }
           }
@@ -1589,8 +1575,6 @@
         "jodid25519": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true,
-          "optional": true,
           "requires": {
             "jsbn": "~0.1.0"
           }
@@ -1598,7 +1582,6 @@
         "jsbn": {
           "version": "0.1.1",
           "bundled": true,
-          "dev": true,
           "optional": true
         },
         "json-schema": {
@@ -1918,31 +1901,6 @@
             "hoek": "2.x.x"
           }
         },
-        "sshpk": {
-          "version": "1.13.0",
-          "bundled": true,
-          "dev": true,
-          "optional": true,
-          "requires": {
-            "asn1": "~0.2.3",
-            "assert-plus": "^1.0.0",
-            "bcrypt-pbkdf": "^1.0.0",
-            "dashdash": "^1.12.0",
-            "ecc-jsbn": "~0.1.1",
-            "getpass": "^0.1.1",
-            "jodid25519": "^1.0.0",
-            "jsbn": "~0.1.0",
-            "tweetnacl": "~0.14.0"
-          },
-          "dependencies": {
-            "assert-plus": {
-              "version": "1.0.0",
-              "bundled": true,
-              "dev": true,
-              "optional": true
-            }
-          }
-        },
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
@@ -2032,7 +1990,6 @@
         "tweetnacl": {
           "version": "0.14.5",
           "bundled": true,
-          "dev": true,
           "optional": true
         },
         "uid-number": {
@@ -3012,8 +2969,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.1.tgz",
       "integrity": "sha1-peZUwuWi3rXyAdls77yoDA7y9RM=",
-      "dev": true,
-      "optional": true
+      "dev": true
     },
     "json-schema": {
       "version": "0.2.3",
@@ -4390,6 +4346,12 @@
       "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg==",
       "dev": true
     },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
+      "dev": true
+    },
     "semver": {
       "version": "5.3.0",
       "resolved": "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz",
@@ -4725,9 +4687,9 @@
       "dev": true
     },
     "sshpk": {
-      "version": "1.13.1",
-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.13.1.tgz",
-      "integrity": "sha1-US322mKHFEMW3EwY/hzx2UBzm+M=",
+      "version": "1.16.1",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
+      "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
       "dev": true,
       "requires": {
         "asn1": "~0.2.3",
@@ -4737,6 +4699,7 @@
         "ecc-jsbn": "~0.1.1",
         "getpass": "^0.1.1",
         "jsbn": "~0.1.0",
+        "safer-buffer": "^2.0.2",
         "tweetnacl": "~0.14.0"
       },
       "dependencies": {
@@ -4901,8 +4864,7 @@
       "version": "0.14.5",
       "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
       "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true,
-      "optional": true
+      "dev": true
     },
     "ua-parser-js": {
       "version": "0.7.12",