diff --git a/package-lock.json b/package-lock.json
index 0b70c5d..c147afa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -123,20 +123,6 @@
         "create-hmac": "^1.1.4"
       }
     },
-    "elliptic": {
-      "version": "6.4.1",
-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.4.1.tgz",
-      "integrity": "sha512-BsXLz5sqX8OHcsh7CqBMztyXARmGQ3LWPtGjJi6DiJHq5C/qvi9P3OqgswKSDftbu8+IoI/QDTAm2fFnQ9SZSQ==",
-      "requires": {
-        "bn.js": "^4.4.0",
-        "brorand": "^1.0.1",
-        "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"
-      }
-    },
     "evp_bytestokey": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/evp_bytestokey/-/evp_bytestokey-1.0.3.tgz",
@@ -214,11 +200,6 @@
       "resolved": "https://registry.npmjs.org/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz",
       "integrity": "sha1-9sAMHAsIIkblxNmd+4x8CDsrWCo="
     },
-    "nan": {
-      "version": "2.13.2",
-      "resolved": "https://registry.npmjs.org/nan/-/nan-2.13.2.tgz",
-      "integrity": "sha512-TghvYc72wlMGMVMluVo9WRJc0mB8KxxF/gZ4YYFy7V2ZQX9l7rgbPg7vjS9mt6U5HXODVFVI2bOduCzwOMv/lw=="
-    },
     "pbkdf2": {
       "version": "3.0.17",
       "resolved": "https://registry.npmjs.org/pbkdf2/-/pbkdf2-3.0.17.tgz",
@@ -254,18 +235,51 @@
       "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
     },
     "secp256k1": {
-      "version": "3.6.2",
-      "resolved": "https://registry.npmjs.org/secp256k1/-/secp256k1-3.6.2.tgz",
-      "integrity": "sha512-90nYt7yb0LmI4A2jJs1grglkTAXrBwxYAjP9bpeKjvJKOjG2fOeH/YI/lchDMIvjrOasd5QXwvV2jwN168xNng==",
+      "version": "3.8.1",
+      "resolved": "https://registry.npmjs.org/secp256k1/-/secp256k1-3.8.1.tgz",
+      "integrity": "sha512-tArjQw2P0RTdY7QmkNehgp6TVvQXq6ulIhxv8gaH6YubKG/wxxAoNKcbuXjDhybbc+b2Ihc7e0xxiGN744UIiQ==",
       "requires": {
-        "bindings": "^1.2.1",
-        "bip66": "^1.1.3",
-        "bn.js": "^4.11.3",
-        "create-hash": "^1.1.2",
+        "bindings": "^1.5.0",
+        "bip66": "^1.1.5",
+        "bn.js": "^4.11.8",
+        "create-hash": "^1.2.0",
         "drbg.js": "^1.0.1",
-        "elliptic": "^6.2.3",
-        "nan": "^2.2.1",
-        "safe-buffer": "^5.1.0"
+        "elliptic": "^6.5.7",
+        "nan": "^2.14.0",
+        "safe-buffer": "^5.1.2"
+      },
+      "dependencies": {
+        "elliptic": {
+          "version": "6.5.7",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.7.tgz",
+          "integrity": "sha512-ESVCtTwiA+XhY3wyh24QqRGBoP3rEdDUl3EDUUo9tft074fi19IrdpH7hLCMMP3CIj7jb3W96rn8lt/BqIlt5Q==",
+          "requires": {
+            "bn.js": "^4.11.9",
+            "brorand": "^1.1.0",
+            "hash.js": "^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": {
+              "version": "4.12.0",
+              "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+              "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA=="
+            }
+          }
+        },
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+        },
+        "nan": {
+          "version": "2.22.0",
+          "resolved": "https://registry.npmjs.org/nan/-/nan-2.22.0.tgz",
+          "integrity": "sha512-nbajikzWTMwsW+eSsNm3QwlOs7het9gGJU5dDZzRTQGk03vyBOauxgI4VakDzE0PtsGTmXPsXTbbjVhRwR5mpw=="
+        }
       }
     },
     "sha.js": {