diff --git a/package-lock.json b/package-lock.json
index 59bcabc8b069..8dd890eedc43 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -149,6 +149,14 @@
       "resolved": "https://registry.npmjs.org/@polkadot/jsonrpc/-/jsonrpc-0.2.1.tgz",
       "integrity": "sha512-a/Y0UXhHOQoM162LGYalKID9wfdG3HztuazTgRXmU8ncrnoi/MrQRRsDa5GTSbNuVgSpT535odnHd31ZmzmPoA=="
     },
+    "@polkadot/util": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/@polkadot/util/-/util-0.2.1.tgz",
+      "integrity": "sha512-KbDEABXiHbraer0Os/PEYxxUyXunZV9NPwFroVs8y/FRLYc/Wf2Bahpds8d9SacySUE2aSxPpfCYMi13wq8BNw==",
+      "requires": {
+        "babel-runtime": "6.26.0"
+      }
+    },
     "abbrev": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.9.tgz",
@@ -1489,6 +1497,7 @@
       "requires": {
         "anymatch": "1.3.2",
         "async-each": "1.0.1",
+        "fsevents": "1.1.3",
         "glob-parent": "2.0.0",
         "inherits": "2.0.3",
         "is-binary-path": "1.0.1",
@@ -2317,6 +2326,910 @@
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
       "dev": true
     },
+    "fsevents": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.1.3.tgz",
+      "integrity": "sha512-WIr7iDkdmdbxu/Gh6eKEZJL6KPE74/5MEsf2whTOFNxbIoIixogroLdKYqB6FDav4Wavh/lZdzzd3b2KxIXC5Q==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "nan": "2.8.0",
+        "node-pre-gyp": "0.6.39"
+      },
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+          "version": "1.1.0",
+          "bundled": true,
+          "dev": true,
+          "optional": true
+        },
+        "ajv": {
+          "version": "4.11.8",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "co": "4.6.0",
+            "json-stable-stringify": "1.0.1"
+          }
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+        "ansi-regex": {
+          "version": "2.1.1",
+          "bundled": true,
+          "dev": true
+        },
+        "aproba": {
+          "version": "1.1.1",
+          "bundled": true,
+          "dev": true,
+          "optional": true
+        },
+        "are-we-there-yet": {
+          "version": "1.1.4",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "delegates": "1.0.0",
+            "readable-stream": "2.2.9"
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+        "sntp": {
+          "version": "1.0.9",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "hoek": "2.16.3"
+          }
+        },
+        "sshpk": {
+          "version": "1.13.0",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "asn1": "0.2.3",
+            "assert-plus": "1.0.0",
+            "bcrypt-pbkdf": "1.0.1",
+            "dashdash": "1.14.1",
+            "ecc-jsbn": "0.1.1",
+            "getpass": "0.1.7",
+            "jodid25519": "1.0.2",
+            "jsbn": "0.1.1",
+            "tweetnacl": "0.14.5"
+          },
+          "dependencies": {
+            "assert-plus": {
+              "version": "1.0.0",
+              "bundled": true,
+              "dev": true,
+              "optional": true
+            }
+          }
+        },
+        "string-width": {
+          "version": "1.0.2",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "code-point-at": "1.1.0",
+            "is-fullwidth-code-point": "1.0.0",
+            "strip-ansi": "3.0.1"
+          }
+        },
+        "string_decoder": {
+          "version": "1.0.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "safe-buffer": "5.0.1"
+          }
+        },
+        "stringstream": {
+          "version": "0.0.5",
+          "bundled": true,
+          "dev": true,
+          "optional": true
+        },
+        "strip-ansi": {
+          "version": "3.0.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "ansi-regex": "2.1.1"
+          }
+        },
+        "strip-json-comments": {
+          "version": "2.0.1",
+          "bundled": true,
+          "dev": true,
+          "optional": true
+        },
+        "tar": {
+          "version": "2.2.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "block-stream": "0.0.9",
+            "fstream": "1.0.11",
+            "inherits": "2.0.3"
+          }
+        },
+        "tar-pack": {
+          "version": "3.4.0",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "debug": "2.6.8",
+            "fstream": "1.0.11",
+            "fstream-ignore": "1.0.5",
+            "once": "1.4.0",
+            "readable-stream": "2.2.9",
+            "rimraf": "2.6.1",
+            "tar": "2.2.1",
+            "uid-number": "0.0.6"
+          }
+        },
+        "tough-cookie": {
+          "version": "2.3.2",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "punycode": "1.4.1"
+          }
+        },
+        "tunnel-agent": {
+          "version": "0.6.0",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "safe-buffer": "5.0.1"
+          }
+        },
+        "tweetnacl": {
+          "version": "0.14.5",
+          "bundled": true,
+          "dev": true,
+          "optional": true
+        },
+        "uid-number": {
+          "version": "0.0.6",
+          "bundled": true,
+          "dev": true,
+          "optional": true
+        },
+        "util-deprecate": {
+          "version": "1.0.2",
+          "bundled": true,
+          "dev": true
+        },
+        "uuid": {
+          "version": "3.0.1",
+          "bundled": true,
+          "dev": true,
+          "optional": true
+        },
+        "verror": {
+          "version": "1.3.6",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "extsprintf": "1.0.2"
+          }
+        },
+        "wide-align": {
+          "version": "1.1.2",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "string-width": "1.0.2"
+          }
+        },
+        "wrappy": {
+          "version": "1.0.2",
+          "bundled": true,
+          "dev": true
+        }
+      }
+    },
     "function-bind": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
@@ -3237,6 +4150,13 @@
       "integrity": "sha1-MHXOk7whuPq0PhvE2n6BFe0ee6s=",
       "dev": true
     },
+    "nan": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/nan/-/nan-2.8.0.tgz",
+      "integrity": "sha1-7XFfP+neArV6XmJS2QqWZ14fCFo=",
+      "dev": true,
+      "optional": true
+    },
     "natural-compare": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/natural-compare/-/natural-compare-1.4.0.tgz",
diff --git a/package.json b/package.json
index 3df1728ce47f..70a774ec4669 100644
--- a/package.json
+++ b/package.json
@@ -68,6 +68,7 @@
   },
   "dependencies": {
     "@polkadot/jsonrpc": "^0.2.0",
+    "@polkadot/util": "^0.2.0",
     "babel-runtime": "^6.26.0",
     "isomorphic-fetch": "^2.2.1"
   }
diff --git a/src/api.js b/src/api.js
index d1e7b8498d86..5e6e56c81846 100644
--- a/src/api.js
+++ b/src/api.js
@@ -7,9 +7,9 @@ import type { ProviderInterface } from './provider/types';
 
 const interfaces = require('@polkadot/jsonrpc');
 const { callSignature } = require('@polkadot/jsonrpc/lib/util');
+const { isFunction } = require('@polkadot/util/lib/is');
 const { formatInputs, formatOutput } = require('./format');
 const { HttpProvider } = require('./provider');
-const { isFunction } = require('./util/is');
 
 module.exports = class Api implements ApiInterface {
   _provider: ProviderInterface;
diff --git a/src/api.spec.js b/src/api.spec.js
index 624146972c8f..0f0532b69342 100644
--- a/src/api.spec.js
+++ b/src/api.spec.js
@@ -4,7 +4,7 @@
 
 const sinon = require('sinon');
 
-const { isFunction } = require('./util/is');
+const { isFunction } = require('@polkadot/util/lib/is');
 
 const Api = require('./api');
 
diff --git a/src/format/input/hex.js b/src/format/input/hex.js
index 169a04acba0a..25586deff9d5 100644
--- a/src/format/input/hex.js
+++ b/src/format/input/hex.js
@@ -1,7 +1,7 @@
 // ISC, Copyright 2017 Jaco Greeff
 // @flow
 
-const { addHexPrefix, hasHexPrefix, stripHexPrefix } = require('../../util/hex');
+const { addHexPrefix, hasHexPrefix, stripHexPrefix } = require('@polkadot/util/lib/hex');
 
 const H64_ZERO: string = '00000000000000000000000000000000';
 const H128_ZERO: string = `${H64_ZERO}${H64_ZERO}`;
diff --git a/src/format/util.js b/src/format/util.js
index 7bb86e180801..874263b6de20 100644
--- a/src/format/util.js
+++ b/src/format/util.js
@@ -3,8 +3,8 @@
 
 import type { FormatterFunction } from './types';
 
+const { isUndefined } = require('@polkadot/util/lib/is');
 const formatNoop = require('./noop');
-const { isUndefined } = require('../util/is');
 
 function format (formatters: { [any]: FormatterFunction }, type: string, value: any): any {
   const formatter = formatters[type];
diff --git a/src/provider/jsonRpcCoder.js b/src/provider/jsonRpcCoder.js
index 39ebe3191941..e47eceb6e270 100644
--- a/src/provider/jsonRpcCoder.js
+++ b/src/provider/jsonRpcCoder.js
@@ -3,7 +3,7 @@
 
 import type { JsonRpcRequest, JsonRpcResponse } from './types';
 
-const { isNumber, isUndefined } = require('../util/is');
+const { isNumber, isUndefined } = require('@polkadot/util/lib/is');
 
 module.exports = class JsonRpcCoder {
   _id: number = 0;
diff --git a/src/util/hex.js b/src/util/hex.js
deleted file mode 100644
index dacb263a659b..000000000000
--- a/src/util/hex.js
+++ /dev/null
@@ -1,28 +0,0 @@
-// ISC, Copyright 2017 Jaco Greeff
-// @flow
-
-function addHexPrefix (value: ?string): string {
-  if (value && hasHexPrefix(value)) {
-    return value;
-  }
-
-  return `0x${value || ''}`;
-}
-
-function hasHexPrefix (value: ?string): boolean {
-  return !!(value && value.substr(0, 2) === '0x');
-}
-
-function stripHexPrefix (value: ?string): string {
-  if (value && hasHexPrefix(value)) {
-    return value.substr(2);
-  }
-
-  return value || '';
-}
-
-module.exports = {
-  addHexPrefix,
-  hasHexPrefix,
-  stripHexPrefix
-};
diff --git a/src/util/hex.spec.js b/src/util/hex.spec.js
deleted file mode 100644
index be4bdccfb409..000000000000
--- a/src/util/hex.spec.js
+++ /dev/null
@@ -1,67 +0,0 @@
-// ISC, Copyright 2017 Jaco Greeff
-
-/* eslint-disable no-unused-expressions */
-
-const { addHexPrefix, hasHexPrefix, stripHexPrefix } = require('./hex');
-
-describe('util/hex', () => {
-  describe('addHexPrefix', () => {
-    it('does not add when prefix is available', () => {
-      expect(
-        addHexPrefix('0x123')
-      ).to.equal('0x123');
-    });
-
-    it('adds the prefix when it is not available', () => {
-      expect(
-        addHexPrefix('123')
-      ).to.equal('0x123');
-    });
-
-    it('returns null as 0x', () => {
-      expect(
-        addHexPrefix(null)
-      ).to.equal('0x');
-    });
-  });
-
-  describe('hasHexPrefix', () => {
-    it('returns true when hex prefix is found', () => {
-      expect(
-        hasHexPrefix('0x123')
-      ).to.be.true;
-    });
-
-    it('returns false when no prefix attached', () => {
-      expect(
-        hasHexPrefix('123')
-      ).to.be.false;
-    });
-
-    it('returns false when null value supplied', () => {
-      expect(
-        hasHexPrefix(null)
-      ).to.be.false;
-    });
-  });
-
-  describe('stripHexPrefix', () => {
-    it('returns the value as-is when no prefix', () => {
-      expect(
-        stripHexPrefix('01ab')
-      ).to.equal('01ab');
-    });
-
-    it('returns an empty string when null value supplied', () => {
-      expect(
-        stripHexPrefix(null)
-      ).to.equal('');
-    });
-
-    it('strips the prefix from other strings', () => {
-      expect(
-        stripHexPrefix('0x1223')
-      ).to.equal('1223');
-    });
-  });
-});
diff --git a/src/util/is.js b/src/util/is.js
deleted file mode 100644
index be2d6b635d42..000000000000
--- a/src/util/is.js
+++ /dev/null
@@ -1,20 +0,0 @@
-// ISC, Copyright 2017 Jaco Greeff
-// @flow
-
-function isFunction (value: any): boolean {
-  return typeof value === 'function';
-}
-
-function isNumber (value: any): boolean {
-  return typeof value === 'number';
-}
-
-function isUndefined (value: any): boolean {
-  return typeof value === 'undefined';
-}
-
-module.exports = {
-  isFunction,
-  isNumber,
-  isUndefined
-};
diff --git a/src/util/is.spec.js b/src/util/is.spec.js
deleted file mode 100644
index dc2246420326..000000000000
--- a/src/util/is.spec.js
+++ /dev/null
@@ -1,49 +0,0 @@
-// ISC, Copyright 2017 Jaco Greeff
-
-/* eslint-disable no-unused-expressions */
-
-const { isFunction, isNumber, isUndefined } = require('./is');
-
-describe('util/is', () => {
-  describe('isFunction', () => {
-    it('returns true on valid functions', () => {
-      expect(
-        isFunction(isFunction)
-      ).to.be.true;
-    });
-
-    it('returns false of invalid functions', () => {
-      expect(
-        isFunction('notAFunction')
-      ).to.be.false;
-    });
-  });
-
-  describe('isNumber', () => {
-    it('returns true on valid numbers', () => {
-      expect(
-        isNumber(2)
-      ).to.be.true;
-    });
-
-    it('returns fals on invalid numbers', () => {
-      expect(
-        isNumber('2')
-      ).to.be.false;
-    });
-  });
-
-  describe('isUndefined', () => {
-    it('returns true on undefined values', () => {
-      expect(
-        isUndefined()
-      ).to.be.true;
-    });
-
-    it('returns false on defined values', () => {
-      expect(
-        isUndefined(null)
-      ).to.be.false;
-    });
-  });
-});