diff --git a/lib/IPAddress.js b/lib/IPAddress.js
index 124ea5c..297de49 100644
--- a/lib/IPAddress.js
+++ b/lib/IPAddress.js
@@ -1,10 +1,10 @@
 'use strict';
 
-var IPv6 = require('ip-address').v6;
-var IPv4 = require('ip-address').v4;
+var IPv6 = require('ip-address').Address6;
+var IPv4 = require('ip-address').Address4;
 
 exports.parseIPv4 = function parseIPv4(ip) {
-    var v4Address = new IPv4.Address(ip);
+    var v4Address = new IPv4(ip);
     if (!v4Address.isValid()) {
         throw new Error("Invalid IPv4 address");
     }
@@ -12,7 +12,7 @@ exports.parseIPv4 = function parseIPv4(ip) {
 };
 
 exports.parseIPv6 = function parseIPv6(ip) {
-    var v6Address = new IPv6.Address(ip);
+    var v6Address = new IPv6(ip);
     if (!v6Address.isValid()) {
         throw new Error("Invalid IPv6 address");
     }
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..3858d87
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1042 @@
+{
+    "name": "@uber/maxmind-db-reader",
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+    "requires": true,
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+            "dev": true
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+            "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
+            "dev": true,
+            "requires": {
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+                "longest": "1.0.1",
+                "repeat-string": "1.6.1"
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+                    "resolved": "https://unpm.uberinternal.com/kind-of/-/kind-of-3.2.2.tgz",
+                    "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+                    "dev": true,
+                    "requires": {
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+            "resolved": "https://unpm.uberinternal.com/amdefine/-/amdefine-1.0.1.tgz",
+            "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
+            "dev": true
+        },
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+            "resolved": "https://unpm.uberinternal.com/argparse/-/argparse-1.0.9.tgz",
+            "integrity": "sha1-c9g7wmP4bpf4zE9rrhsOkKfSLIY=",
+            "dev": true,
+            "requires": {
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+            }
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+            "resolved": "https://unpm.uberinternal.com/async/-/async-1.5.2.tgz",
+            "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+            "dev": true
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+            "dev": true,
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+            "dev": true,
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+            "dev": true
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+                    "integrity": "sha1-sX0I0ya0Qj5Wjv9xn5GwscvfafE=",
+                    "dev": true
+                }
+            }
+        },
+        "which": {
+            "version": "1.3.0",
+            "resolved": "https://unpm.uberinternal.com/which/-/which-1.3.0.tgz",
+            "integrity": "sha512-xcJpopdamTuY5duC/KnTTNBraPK54YwpenP4lzxU8H91GudWpFv38u0CKjclE1Wi2EH2EDz5LRcHcKbCIzqGyg==",
+            "dev": true,
+            "requires": {
+                "isexe": "2.0.0"
+            }
+        },
+        "window-size": {
+            "version": "0.1.0",
+            "resolved": "https://unpm.uberinternal.com/window-size/-/window-size-0.1.0.tgz",
+            "integrity": "sha1-VDjNLqk7IC76Ohn+iIeu58lPnJ0=",
+            "dev": true,
+            "optional": true
+        },
+        "wordwrap": {
+            "version": "1.0.0",
+            "resolved": "https://unpm.uberinternal.com/wordwrap/-/wordwrap-1.0.0.tgz",
+            "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
+            "dev": true
+        },
+        "wrappy": {
+            "version": "1.0.2",
+            "resolved": "https://unpm.uberinternal.com/wrappy/-/wrappy-1.0.2.tgz",
+            "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+            "dev": true
+        },
+        "xtend": {
+            "version": "4.0.1",
+            "resolved": "https://unpm.uberinternal.com/xtend/-/xtend-4.0.1.tgz",
+            "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
+            "dev": true
+        },
+        "yargs": {
+            "version": "3.10.0",
+            "resolved": "https://unpm.uberinternal.com/yargs/-/yargs-3.10.0.tgz",
+            "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
+            "dev": true,
+            "optional": true,
+            "requires": {
+                "camelcase": "1.2.1",
+                "cliui": "2.1.0",
+                "decamelize": "1.2.0",
+                "window-size": "0.1.0"
+            },
+            "dependencies": {
+                "camelcase": {
+                    "version": "1.2.1",
+                    "resolved": "https://unpm.uberinternal.com/camelcase/-/camelcase-1.2.1.tgz",
+                    "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
+                    "dev": true,
+                    "optional": true
+                }
+            }
+        }
+    }
+}
diff --git a/package.json b/package.json
index d9bd74c..6385948 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "maxmind-db-reader",
-    "version": "0.2.1",
+    "version": "1.0.0",
     "description": "This is the pure Node API for reading MaxMind DB files. MaxMind DB is a binary file format that stores data indexed by IP address subnets (IPv4 or IPv6).",
     "main": "./index.js",
     "contributors": [
@@ -15,6 +15,10 @@
         {
             "name": "Rajesh Segu",
             "email": "rajesh.segu@gmail.com"
+        }, 
+        {
+            "name": "Aleksey Smolenchuk",
+            "email": "lxe@lxe.co"
         }
     ],
     "repository": {
@@ -36,14 +40,14 @@
         "email": "pkloes@web.de"
     },
     "dependencies": {
-        "big-integer": ">=1.1.5",
-        "ip-address": "4.0.0"
+        "big-integer": ">=1.6.26",
+        "ip-address": "5.8.9"
     },
     "devDependencies": {
-        "istanbul": "^0.3.13",
-        "jshint": "2.4.2",
-        "path": "^0.11.14",
-        "scotch-tape": "0.2.0"
+        "istanbul": "^0.4.5",
+        "jshint": "2.9.5",
+        "path": "^0.12.7",
+        "scotch-tape": "0.2.1"
     },
     "scripts": {
         "cover": "istanbul cover --report cobertura --print detail tape -- test/test.js",
@@ -57,7 +61,7 @@
             "url": "https://github.com/PaddeK/node-maxmind-db/blob/master/LICENSE"
         }
     ],
-    "engine": {
-        "node": ">=0.8.0"
+    "engines": {
+        "node": ">=4.0"
     }
 }