diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index cd8ea4c..f3bfced 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -22,6 +22,11 @@
       "from": "bs58@2.0.0",
       "resolved": "https://registry.npmjs.org/bs58/-/bs58-2.0.0.tgz"
     },
+    "buffers": {
+      "version": "0.1.1",
+      "from": "buffers@0.1.1",
+      "resolved": "https://registry.npmjs.org/buffers/-/buffers-0.1.1.tgz"
+    },
     "elliptic": {
       "version": "0.15.12",
       "from": "elliptic@0.15.12",
diff --git a/package.json b/package.json
index 8af7aab..c5469ec 100644
--- a/package.json
+++ b/package.json
@@ -74,6 +74,7 @@
     "asn1.js": "=0.4.1",
     "bn.js": "=0.15.2",
     "bs58": "=2.0.0",
+    "buffers": "^0.1.1",
     "elliptic": "=0.15.14",
     "hash.js": "=0.3.2",
     "inherits": "=2.0.1",
@@ -97,9 +98,7 @@
     "run-sequence": "^1.0.2",
     "karma": "^0.12.28",
     "karma-firefox-launcher": "^0.1.3",
-    "karma-mocha": "^0.1.9",
-    "mocha": "~2.0.1",
-    "run-sequence": "^1.0.2"
+    "karma-mocha": "^0.1.9"
   },
   "license": "MIT"
 }