diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 1f09939..62cd952 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -13,9 +13,9 @@
       "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-0.4.1.tgz"
     },
     "bn.js": {
-      "version": "0.15.2",
-      "from": "bn.js@0.15.2",
-      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-0.15.2.tgz"
+      "version": "0.16.0",
+      "from": "bn.js@0.16.0",
+      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-0.16.0.tgz"
     },
     "bs58": {
       "version": "2.0.0",
@@ -33,14 +33,19 @@
       "resolved": "https://registry.npmjs.org/buffers/-/buffers-0.1.1.tgz"
     },
     "elliptic": {
-      "version": "0.15.12",
-      "from": "elliptic@0.15.12",
-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-0.15.12.tgz",
+      "version": "0.16.0",
+      "from": "elliptic@0.16.0",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-0.16.0.tgz",
       "dependencies": {
         "bn.js": {
-          "version": "0.15.2",
-          "from": "bn.js@0.15.2",
-          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-0.15.2.tgz"
+          "version": "0.16.0",
+          "from": "bn.js@0.16.0",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-0.16.0.tgz"
+        },
+        "brorand": {
+          "version": "1.0.1",
+          "from": "brorand@1.0.1",
+          "resolved": "https://registry.npmjs.org/brorand/-/brorand-1.0.1.tgz"
         },
         "hash.js": {
           "version": "0.3.2",
diff --git a/package.json b/package.json
index f36534d..a0aa3df 100644
--- a/package.json
+++ b/package.json
@@ -71,11 +71,11 @@
   },
   "dependencies": {
     "asn1.js": "=0.4.1",
-    "bn.js": "=0.15.2",
+    "bn.js": "=0.16.0",
     "bs58": "=2.0.0",
     "bufferput": "^0.1.2",
     "buffers": "^0.1.1",
-    "elliptic": "=0.15.14",
+    "elliptic": "=0.16.0",
     "hash.js": "=0.3.2",
     "inherits": "=2.0.1",
     "jsrsasign": "=0.0.3",