diff --git a/package-lock.json b/package-lock.json
index 71973fe..6e23f9e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -544,17 +544,29 @@
       }
     },
     "elliptic": {
-      "version": "6.4.1",
-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.4.1.tgz",
-      "integrity": "sha512-BsXLz5sqX8OHcsh7CqBMztyXARmGQ3LWPtGjJi6DiJHq5C/qvi9P3OqgswKSDftbu8+IoI/QDTAm2fFnQ9SZSQ==",
+      "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": {
+          "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=="
+        }
       }
     },
     "end-of-stream": {
@@ -1246,10 +1258,6 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-1.0.0.tgz",
           "integrity": "sha1-cT2LgY2kIGh0C/aDhtBHnmb8ins="
-        },
-        "webcrypto-shim": {
-          "version": "github:dignifiedquire/webcrypto-shim#190bc9ec341375df6025b17ae12ddb2428ea49c8",
-          "from": "github:dignifiedquire/webcrypto-shim#master"
         }
       }
     },
@@ -1730,7 +1738,7 @@
           "dependencies": {
             "webcrypto-shim": {
               "version": "github:dignifiedquire/webcrypto-shim#190bc9ec341375df6025b17ae12ddb2428ea49c8",
-              "from": "github:dignifiedquire/webcrypto-shim#master"
+              "from": "github:dignifiedquire/webcrypto-shim#190bc9ec341375df6025b17ae12ddb2428ea49c8"
             }
           }
         },
@@ -1799,7 +1807,7 @@
           "dependencies": {
             "webcrypto-shim": {
               "version": "github:dignifiedquire/webcrypto-shim#190bc9ec341375df6025b17ae12ddb2428ea49c8",
-              "from": "github:dignifiedquire/webcrypto-shim#master"
+              "from": "github:dignifiedquire/webcrypto-shim#190bc9ec341375df6025b17ae12ddb2428ea49c8"
             }
           }
         },
@@ -2490,6 +2498,10 @@
         }
       }
     },
+    "webcrypto-shim": {
+      "version": "github:dignifiedquire/webcrypto-shim#190bc9ec341375df6025b17ae12ddb2428ea49c8",
+      "from": "github:dignifiedquire/webcrypto-shim#190bc9ec341375df6025b17ae12ddb2428ea49c8"
+    },
     "websocket": {
       "version": "1.0.28",
       "resolved": "https://registry.npmjs.org/websocket/-/websocket-1.0.28.tgz",