diff --git a/package-lock.json b/package-lock.json
index d0db058b..52edc86a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -829,6 +829,30 @@
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       "integrity": "sha1-JuYe0UIvtw3ULm42cp7VHYVf6Nk="
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+    "bufferutil": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/bufferutil/-/bufferutil-1.3.0.tgz",
+      "integrity": "sha1-af3xOtnZEiK67hCZRfqtxDFTT4Y=",
+      "optional": true,
+      "requires": {
+        "bindings": "~1.2.1",
+        "nan": "~2.4.0"
+      },
+      "dependencies": {
+        "bindings": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.2.1.tgz",
+          "integrity": "sha1-FK1hE4EtLTfXLme0ystLtyZQXxE=",
+          "optional": true
+        },
+        "nan": {
+          "version": "2.4.0",
+          "resolved": "https://registry.npmjs.org/nan/-/nan-2.4.0.tgz",
+          "integrity": "sha1-+zxZ1F/k7/4hXwuJD4rfbrMtIjI=",
+          "optional": true
+        }
+      }
+    },
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       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
@@ -1625,17 +1649,24 @@
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     "elliptic": {
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-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.2.tgz",
-      "integrity": "sha512-f4x70okzZbIQl/NSRLkI/+tteV/9WqL98zx+SQ69KbXxmVrmjwsNUPn/gYJJ0sHvEak24cZgHIPegRePAtA/xw==",
+      "version": "6.5.4",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+      "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
       "requires": {
-        "bn.js": "^4.4.0",
-        "brorand": "^1.0.1",
+        "bn.js": "^4.11.9",
+        "brorand": "^1.1.0",
         "hash.js": "^1.0.0",
-        "hmac-drbg": "^1.0.0",
-        "inherits": "^2.0.1",
-        "minimalistic-assert": "^1.0.0",
-        "minimalistic-crypto-utils": "^1.0.0"
+        "hmac-drbg": "^1.0.1",
+        "inherits": "^2.0.4",
+        "minimalistic-assert": "^1.0.1",
+        "minimalistic-crypto-utils": "^1.0.1"
+      },
+      "dependencies": {
+        "bn.js": {
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+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+          "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA=="
+        }
       }
     },
     "encoding": {
@@ -10686,6 +10717,30 @@
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     },
+    "utf-8-validate": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/utf-8-validate/-/utf-8-validate-2.0.0.tgz",
+      "integrity": "sha1-OPVjbXjC5Mwg4TJHDMTQa5IZLkQ=",
+      "optional": true,
+      "requires": {
+        "bindings": "~1.2.1",
+        "nan": "~2.4.0"
+      },
+      "dependencies": {
+        "bindings": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.2.1.tgz",
+          "integrity": "sha1-FK1hE4EtLTfXLme0ystLtyZQXxE=",
+          "optional": true
+        },
+        "nan": {
+          "version": "2.4.0",
+          "resolved": "https://registry.npmjs.org/nan/-/nan-2.4.0.tgz",
+          "integrity": "sha1-+zxZ1F/k7/4hXwuJD4rfbrMtIjI=",
+          "optional": true
+        }
+      }
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",