diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 0964567e..ca378acf 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -1,93 +1,126 @@
 {
   "name": "ripple-lib",
   "version": "0.13.0",
-  "npm-shrinkwrap-version": "5.4.0",
-  "node-version": "v0.12.7",
   "dependencies": {
     "ajv": {
       "version": "1.4.8",
+      "from": "https://registry.npmjs.org/ajv/-/ajv-1.4.8.tgz",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-1.4.8.tgz",
       "dependencies": {
         "json-stable-stringify": {
           "version": "1.0.0",
+          "from": "https://registry.npmjs.org/json-stable-stringify/-/json-stable-stringify-1.0.0.tgz",
           "resolved": "https://registry.npmjs.org/json-stable-stringify/-/json-stable-stringify-1.0.0.tgz",
           "dependencies": {
             "jsonify": {
               "version": "0.0.0",
+              "from": "https://registry.npmjs.org/jsonify/-/jsonify-0.0.0.tgz",
               "resolved": "https://registry.npmjs.org/jsonify/-/jsonify-0.0.0.tgz"
             }
           }
         }
       }
     },
+    "babel-polyfill": {
+      "version": "6.2.0",
+      "from": "babel-polyfill@*",
+      "resolved": "https://registry.npmjs.org/babel-polyfill/-/babel-polyfill-6.2.0.tgz",
+      "dependencies": {
+        "core-js": {
+          "version": "1.2.6",
+          "from": "core-js@>=1.0.1 <2.0.0",
+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-1.2.6.tgz"
+        },
+        "babel-regenerator-runtime": {
+          "version": "6.2.0",
+          "from": "babel-regenerator-runtime@>=6.2.0 <7.0.0",
+          "resolved": "https://registry.npmjs.org/babel-regenerator-runtime/-/babel-regenerator-runtime-6.2.0.tgz"
+        }
+      }
+    },
     "babel-runtime": {
       "version": "5.8.29",
+      "from": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-5.8.29.tgz",
       "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-5.8.29.tgz",
       "dependencies": {
         "core-js": {
           "version": "1.2.3",
+          "from": "https://registry.npmjs.org/core-js/-/core-js-1.2.3.tgz",
           "resolved": "https://registry.npmjs.org/core-js/-/core-js-1.2.3.tgz"
         }
       }
     },
     "bignumber.js": {
       "version": "2.1.0",
+      "from": "bignumber.js@>=2.0.3 <3.0.0",
       "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-2.1.0.tgz"
     },
     "https-proxy-agent": {
       "version": "1.0.0",
+      "from": "https-proxy-agent@>=1.0.0 <2.0.0",
       "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-1.0.0.tgz",
       "dependencies": {
         "agent-base": {
           "version": "2.0.1",
+          "from": "agent-base@>=2.0.0 <3.0.0",
           "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-2.0.1.tgz",
           "dependencies": {
             "semver": {
               "version": "5.0.3",
+              "from": "semver@>=5.0.1 <5.1.0",
               "resolved": "https://registry.npmjs.org/semver/-/semver-5.0.3.tgz"
             }
           }
         },
         "debug": {
           "version": "2.2.0",
+          "from": "debug@>=2.0.0 <3.0.0",
           "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
           "dependencies": {
             "ms": {
               "version": "0.7.1",
+              "from": "ms@0.7.1",
               "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz"
             }
           }
         },
         "extend": {
           "version": "3.0.0",
+          "from": "extend@>=3.0.0 <4.0.0",
           "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.0.tgz"
         }
       }
     },
     "lodash": {
       "version": "3.10.1",
+      "from": "lodash@>=3.1.0 <4.0.0",
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz"
     },
     "ripple-address-codec": {
       "version": "2.0.1",
+      "from": "ripple-address-codec@>=2.0.1 <3.0.0",
       "resolved": "https://registry.npmjs.org/ripple-address-codec/-/ripple-address-codec-2.0.1.tgz",
       "dependencies": {
         "hash.js": {
           "version": "1.0.3",
+          "from": "hash.js@>=1.0.3 <2.0.0",
           "resolved": "https://registry.npmjs.org/hash.js/-/hash.js-1.0.3.tgz",
           "dependencies": {
             "inherits": {
               "version": "2.0.1",
+              "from": "inherits@>=2.0.1 <3.0.0",
               "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
             }
           }
         },
         "x-address-codec": {
           "version": "0.7.2",
+          "from": "x-address-codec@>=0.7.0 <0.8.0",
           "resolved": "https://registry.npmjs.org/x-address-codec/-/x-address-codec-0.7.2.tgz",
           "dependencies": {
             "base-x": {
               "version": "1.0.1",
+              "from": "base-x@>=1.0.1 <2.0.0",
               "resolved": "https://registry.npmjs.org/base-x/-/base-x-1.0.1.tgz"
             }
           }
@@ -95,131 +128,140 @@
       }
     },
     "ripple-binary-codec": {
-      "version": "0.0.7",
-      "resolved": "https://registry.npmjs.org/ripple-binary-codec/-/ripple-binary-codec-0.0.7.tgz",
+      "version": "0.1.0",
+      "from": "ripple-binary-codec@0.1.0",
+      "resolved": "https://registry.npmjs.org/ripple-binary-codec/-/ripple-binary-codec-0.1.0.tgz",
       "dependencies": {
-        "babel-runtime": {
-          "version": "5.8.34",
-          "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-5.8.34.tgz",
-          "dependencies": {
-            "core-js": {
-              "version": "1.2.6",
-              "resolved": "https://registry.npmjs.org/core-js/-/core-js-1.2.6.tgz"
-            }
-          }
-        },
         "bn.js": {
           "version": "3.3.0",
+          "from": "bn.js@>=3.2.0 <4.0.0",
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-3.3.0.tgz"
         },
         "create-hash": {
           "version": "1.1.2",
+          "from": "create-hash@>=1.1.2 <2.0.0",
           "resolved": "https://registry.npmjs.org/create-hash/-/create-hash-1.1.2.tgz",
           "dependencies": {
             "cipher-base": {
               "version": "1.0.2",
+              "from": "cipher-base@>=1.0.1 <2.0.0",
               "resolved": "https://registry.npmjs.org/cipher-base/-/cipher-base-1.0.2.tgz"
             },
             "ripemd160": {
               "version": "1.0.1",
+              "from": "ripemd160@>=1.0.0 <2.0.0",
               "resolved": "https://registry.npmjs.org/ripemd160/-/ripemd160-1.0.1.tgz"
             },
             "sha.js": {
               "version": "2.4.4",
+              "from": "sha.js@>=2.3.6 <3.0.0",
               "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.4.tgz"
             }
           }
         },
         "decimal.js": {
           "version": "4.0.3",
+          "from": "decimal.js@>=4.0.2 <5.0.0",
           "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-4.0.3.tgz"
         },
         "inherits": {
           "version": "2.0.1",
+          "from": "inherits@>=2.0.1 <3.0.0",
           "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
-        },
-        "lodash": {
-          "version": "3.10.1",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz"
-        },
-        "ripple-address-codec": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/ripple-address-codec/-/ripple-address-codec-2.0.1.tgz",
-          "dependencies": {
-            "hash.js": {
-              "version": "1.0.3",
-              "resolved": "https://registry.npmjs.org/hash.js/-/hash.js-1.0.3.tgz"
-            },
-            "x-address-codec": {
-              "version": "0.7.2",
-              "resolved": "https://registry.npmjs.org/x-address-codec/-/x-address-codec-0.7.2.tgz",
-              "dependencies": {
-                "base-x": {
-                  "version": "1.0.1",
-                  "resolved": "https://registry.npmjs.org/base-x/-/base-x-1.0.1.tgz"
-                }
-              }
-            }
-          }
         }
       }
     },
     "ripple-hashes": {
       "version": "0.0.1",
+      "from": "ripple-hashes@>=0.0.1 <0.0.2",
       "resolved": "https://registry.npmjs.org/ripple-hashes/-/ripple-hashes-0.0.1.tgz",
       "dependencies": {
         "create-hash": {
           "version": "1.1.2",
+          "from": "create-hash@>=1.1.2 <2.0.0",
           "resolved": "https://registry.npmjs.org/create-hash/-/create-hash-1.1.2.tgz",
           "dependencies": {
             "cipher-base": {
               "version": "1.0.2",
+              "from": "cipher-base@>=1.0.1 <2.0.0",
               "resolved": "https://registry.npmjs.org/cipher-base/-/cipher-base-1.0.2.tgz"
             },
             "inherits": {
               "version": "2.0.1",
+              "from": "inherits@>=2.0.1 <3.0.0",
               "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
             },
             "ripemd160": {
               "version": "1.0.1",
+              "from": "ripemd160@>=1.0.0 <2.0.0",
               "resolved": "https://registry.npmjs.org/ripemd160/-/ripemd160-1.0.1.tgz"
             },
             "sha.js": {
               "version": "2.4.4",
+              "from": "sha.js@>=2.3.6 <3.0.0",
               "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.4.tgz"
             }
           }
+        },
+        "ripple-binary-codec": {
+          "version": "0.0.6",
+          "from": "ripple-binary-codec@>=0.0.6 <0.0.7",
+          "resolved": "https://registry.npmjs.org/ripple-binary-codec/-/ripple-binary-codec-0.0.6.tgz",
+          "dependencies": {
+            "bn.js": {
+              "version": "3.3.0",
+              "from": "bn.js@>=3.2.0 <4.0.0",
+              "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-3.3.0.tgz"
+            },
+            "decimal.js": {
+              "version": "4.0.3",
+              "from": "decimal.js@>=4.0.2 <5.0.0",
+              "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-4.0.3.tgz"
+            },
+            "inherits": {
+              "version": "2.0.1",
+              "from": "inherits@>=2.0.1 <3.0.0",
+              "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
+            }
+          }
         }
       }
     },
     "ripple-keypairs": {
       "version": "0.10.0",
+      "from": "ripple-keypairs@>=0.10.0 <0.11.0",
       "resolved": "https://registry.npmjs.org/ripple-keypairs/-/ripple-keypairs-0.10.0.tgz",
       "dependencies": {
         "bn.js": {
           "version": "3.3.0",
+          "from": "bn.js@>=3.1.1 <4.0.0",
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-3.3.0.tgz"
         },
         "brorand": {
           "version": "1.0.5",
+          "from": "brorand@>=1.0.5 <2.0.0",
           "resolved": "https://registry.npmjs.org/brorand/-/brorand-1.0.5.tgz"
         },
         "elliptic": {
           "version": "5.2.1",
+          "from": "elliptic@>=5.1.0 <6.0.0",
           "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-5.2.1.tgz",
           "dependencies": {
             "inherits": {
               "version": "2.0.1",
+              "from": "inherits@>=2.0.1 <3.0.0",
               "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
             }
           }
         },
         "hash.js": {
           "version": "1.0.3",
+          "from": "hash.js@>=1.0.3 <2.0.0",
           "resolved": "https://registry.npmjs.org/hash.js/-/hash.js-1.0.3.tgz",
           "dependencies": {
             "inherits": {
               "version": "2.0.1",
+              "from": "inherits@>=2.0.1 <3.0.0",
               "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
             }
           }
@@ -228,19 +270,57 @@
     },
     "ripple-lib-transactionparser": {
       "version": "0.6.0",
+      "from": "ripple-lib-transactionparser@>=0.6.0 <0.7.0",
       "resolved": "https://registry.npmjs.org/ripple-lib-transactionparser/-/ripple-lib-transactionparser-0.6.0.tgz"
     },
     "ws": {
       "version": "0.7.2",
+      "from": "ws@>=0.7.1 <0.8.0",
       "resolved": "https://registry.npmjs.org/ws/-/ws-0.7.2.tgz",
       "dependencies": {
         "options": {
           "version": "0.0.6",
+          "from": "options@>=0.0.5",
           "resolved": "https://registry.npmjs.org/options/-/options-0.0.6.tgz"
         },
         "ultron": {
           "version": "1.0.2",
+          "from": "ultron@>=1.0.0 <1.1.0",
           "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.0.2.tgz"
+        },
+        "bufferutil": {
+          "version": "1.1.0",
+          "from": "bufferutil@>=1.1.0 <1.2.0",
+          "resolved": "https://registry.npmjs.org/bufferutil/-/bufferutil-1.1.0.tgz",
+          "dependencies": {
+            "bindings": {
+              "version": "1.2.1",
+              "from": "bindings@>=1.2.0 <1.3.0",
+              "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.2.1.tgz"
+            },
+            "nan": {
+              "version": "1.8.4",
+              "from": "nan@>=1.8.0 <1.9.0",
+              "resolved": "https://registry.npmjs.org/nan/-/nan-1.8.4.tgz"
+            }
+          }
+        },
+        "utf-8-validate": {
+          "version": "1.1.0",
+          "from": "utf-8-validate@>=1.1.0 <1.2.0",
+          "resolved": "https://registry.npmjs.org/utf-8-validate/-/utf-8-validate-1.1.0.tgz",
+          "dependencies": {
+            "bindings": {
+              "version": "1.2.1",
+              "from": "bindings@>=1.2.0 <1.3.0",
+              "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.2.1.tgz"
+            },
+            "nan": {
+              "version": "1.8.4",
+              "from": "nan@>=1.8.0 <1.9.0",
+              "resolved": "https://registry.npmjs.org/nan/-/nan-1.8.4.tgz"
+            }
+          }
         }
       }
     }
diff --git a/package.json b/package.json
index 6949102b..9f2accf5 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
   },
   "dependencies": {
     "ajv": "^1.4.8",
+    "babel-polyfill": "^6.2.0",
     "babel-runtime": "^5.5.4",
     "bignumber.js": "^2.0.3",
     "https-proxy-agent": "^1.0.0",