diff --git a/package.json b/package.json
index 9fbd71898fcb..19108d813ce4 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "test": "jest --coverage"
   },
   "devDependencies": {
-    "@polkadot/dev": "^0.13.3",
+    "@polkadot/dev": "^0.13.4",
     "lerna": "^2.5.1"
   }
 }
diff --git a/packages/api-format/package.json b/packages/api-format/package.json
index a55e3713719a..40209093c94b 100644
--- a/packages/api-format/package.json
+++ b/packages/api-format/package.json
@@ -33,8 +33,8 @@
     "@polkadot/api-jsonrpc": "^0.6.5"
   },
   "dependencies": {
-    "@polkadot/primitives-json": "^0.1.5",
-    "@polkadot/util": "^0.6.7",
+    "@polkadot/primitives-json": "^0.3.1",
+    "@polkadot/util": "^0.9.1",
     "babel-runtime": "^6.26.0"
   }
 }
diff --git a/packages/api-format/src/noop.js b/packages/api-format/src/echo.js
similarity index 54%
rename from packages/api-format/src/noop.js
rename to packages/api-format/src/echo.js
index 6fc35ab9e808..62f5c38d1871 100644
--- a/packages/api-format/src/noop.js
+++ b/packages/api-format/src/echo.js
@@ -1,6 +1,6 @@
 // ISC, Copyright 2017 Jaco Greeff
 // @flow
 
-module.exports = function format (value: any): any {
+module.exports = function echo (value: any): any {
   return value;
 };
diff --git a/packages/api-format/src/noop.spec.js b/packages/api-format/src/echo.spec.js
similarity index 68%
rename from packages/api-format/src/noop.spec.js
rename to packages/api-format/src/echo.spec.js
index 46bdca6bcd37..719d7269abfb 100644
--- a/packages/api-format/src/noop.spec.js
+++ b/packages/api-format/src/echo.spec.js
@@ -1,13 +1,13 @@
 // ISC, Copyright 2017 Jaco Greeff
 
-const format = require('./noop');
+const echo = require('./echo');
 
-describe('noop', () => {
+describe('echo', () => {
   it('returns input value as output value', () => {
     const input = { 'some': 'object' };
 
     expect(
-      format(input)
+      echo(input)
     ).toEqual(input);
   });
 });
diff --git a/packages/api-format/src/input.js b/packages/api-format/src/input.js
index f991915d25cb..cf7f2faa814a 100644
--- a/packages/api-format/src/input.js
+++ b/packages/api-format/src/input.js
@@ -4,19 +4,20 @@
 import type { FormatInputType, InterfaceInputType } from '@polkadot/api-jsonrpc/types';
 import type { FormatterFunction } from './types';
 
-const accountIdToJson = require('@polkadot/primitives-json/accountId/toJson');
-const h256ToJson = require('@polkadot/primitives-json/h256/toJson');
-const hashToJson = require('@polkadot/primitives-json/hash/toJson');
+const accountIdEncode = require('@polkadot/primitives-json/accountId/encode');
+const h256Encode = require('@polkadot/primitives-json/h256/encode');
+const hashEncode = require('@polkadot/primitives-json/hash/encode');
+const headerHashEncode = require('@polkadot/primitives-json/headerHash/encode');
 
-const formatNoop = require('./noop');
+const echo = require('./echo');
 const util = require('./util');
 
 const formatters: { [FormatInputType]: FormatterFunction } = {
-  'Address': accountIdToJson,
-  'CallData': hashToJson,
-  'H256': h256ToJson,
-  'HeaderHash': h256ToJson,
-  'String': formatNoop
+  'Address': accountIdEncode,
+  'CallData': hashEncode,
+  'H256': h256Encode,
+  'HeaderHash': headerHashEncode,
+  'String': echo
 };
 
 module.exports = function formatInputs (inputs: Array<InterfaceInputType>, values: Array<any>): Array<any> {
diff --git a/packages/api-format/src/input.spec.js b/packages/api-format/src/input.spec.js
index 902f112f6701..73cb3c0bdf08 100644
--- a/packages/api-format/src/input.spec.js
+++ b/packages/api-format/src/input.spec.js
@@ -3,20 +3,18 @@
 const { formatInputs } = require('./index');
 
 describe('formatInputs', () => {
-  describe('format', () => {
-    it('formats each value in an array', () => {
-      expect(
-        formatInputs(
-          [
-            { name: 'foo', type: 'Address' },
-            { name: 'bar', type: 'H256' }
-          ],
-          ['0x1234', '0xabcd']
-        )
-      ).toEqual([
-        '0x0000000000000000000000000000000000001234',
-        '0x000000000000000000000000000000000000000000000000000000000000abcd'
-      ]);
-    });
+  it('formats each value in an array', () => {
+    expect(
+      formatInputs(
+        [
+          { name: 'foo', type: 'Address' },
+          { name: 'bar', type: 'H256' }
+        ],
+        ['0x1234', '0xabcd']
+      )
+    ).toEqual([
+      '0x0000000000000000000000000000000000001234',
+      '0x000000000000000000000000000000000000000000000000000000000000abcd'
+    ]);
   });
 });
diff --git a/packages/api-format/src/output.js b/packages/api-format/src/output.js
index 4c9d3cf45df2..5a8213acacb5 100644
--- a/packages/api-format/src/output.js
+++ b/packages/api-format/src/output.js
@@ -4,15 +4,15 @@
 import type { FormatOutputType, InterfaceOutputType } from '@polkadot/api-jsonrpc/types';
 import type { FormatterFunction } from './types';
 
-const headerFromJson = require('@polkadot/primitives-json/header/fromJson');
+const headerDecode = require('@polkadot/primitives-json/header/decode');
 
-const formatNoop = require('./noop');
+const echo = require('./echo');
 const util = require('./util');
 
 const formatters: { [FormatOutputType]: FormatterFunction } = {
-  'Header': headerFromJson,
-  'OutData': formatNoop,
-  'StorageData': formatNoop
+  'Header': headerDecode,
+  'OutData': echo,
+  'StorageData': echo
 };
 
 module.exports = function formatOutput (output: InterfaceOutputType, value: any): any {
diff --git a/packages/api-format/src/output.spec.js b/packages/api-format/src/output.spec.js
index 152318eae3aa..80f5b99bfb1c 100644
--- a/packages/api-format/src/output.spec.js
+++ b/packages/api-format/src/output.spec.js
@@ -5,36 +5,34 @@ const BN = require('bn.js');
 const { formatOutput } = require('./index');
 
 describe('formatOutput', () => {
-  describe('format', () => {
-    it('formats the value', () => {
-      expect(
-        JSON.stringify(
-          formatOutput({ type: 'Header' }, {
-            parentHash: '0x1234',
-            number: '0x1234',
-            stateRoot: '0x5678',
-            transactionRoot: '0xabcd',
-            digest: {
-              parachainActivityBitfield: '0x1234',
-              logs: ['0x5678', '0x789a']
-            }
-          })
-        )
-      ).toEqual(
-        JSON.stringify({
+  it('formats the value', () => {
+    expect(
+      JSON.stringify(
+        formatOutput({ type: 'Header' }, {
           parentHash: '0x1234',
-          number: new BN(0x1234),
+          number: '0x1234',
           stateRoot: '0x5678',
           transactionRoot: '0xabcd',
           digest: {
-            parachainActivityBitfield: Buffer.from([0x12, 0x34]),
-            logs: [
-              Buffer.from([0x56, 0x78]),
-              Buffer.from([0x78, 0x9a])
-            ]
+            parachainActivityBitfield: '0x1234',
+            logs: ['0x5678', '0x789a']
           }
         })
-      );
-    });
+      )
+    ).toEqual(
+      JSON.stringify({
+        parentHash: '0x0000000000000000000000000000000000000000000000000000000000001234',
+        number: new BN(0x1234),
+        stateRoot: '0x0000000000000000000000000000000000000000000000000000000000005678',
+        transactionRoot: '0x000000000000000000000000000000000000000000000000000000000000abcd',
+        digest: {
+          parachainActivityBitfield: Buffer.from([0x12, 0x34]),
+          logs: [
+            Buffer.from([0x56, 0x78]),
+            Buffer.from([0x78, 0x9a])
+          ]
+        }
+      })
+    );
   });
 });
diff --git a/packages/api-format/src/util.js b/packages/api-format/src/util.js
index 218b2a2a8b82..fb867469c475 100644
--- a/packages/api-format/src/util.js
+++ b/packages/api-format/src/util.js
@@ -5,7 +5,7 @@ import type { FormatterFunction } from './types';
 
 const assert = require('@polkadot/util/assert');
 const isUndefined = require('@polkadot/util/is/undefined');
-const formatNoop = require('./noop');
+const echo = require('./echo');
 
 const arrayTypeRegex = /\[\]$/;
 
@@ -13,9 +13,9 @@ function formatSingleType (formatters: { [any]: FormatterFunction }, type: strin
   const formatter: FormatterFunction = formatters[type];
 
   if (isUndefined(formatter)) {
-    console.warn(`Unable to find default formatter for '${type}', falling back to noop`);
+    console.warn(`Unable to find default formatter for '${type}', falling back to echo`);
 
-    return formatNoop(value);
+    return echo(value);
   }
 
   try {
diff --git a/packages/api-format/src/util.spec.js b/packages/api-format/src/util.spec.js
index e6a024085e11..e51a4dbe64a3 100644
--- a/packages/api-format/src/util.spec.js
+++ b/packages/api-format/src/util.spec.js
@@ -1,20 +1,20 @@
 // ISC, Copyright 2017 Jaco Greeff
 
 const { format, formatArray } = require('./util');
-const formatNoop = require('./noop');
+const echo = require('./echo');
 
 describe('util', () => {
   let formatters;
-  let noopSpy;
+  let echoSpy;
   let warnSpy;
 
   beforeEach(() => {
-    noopSpy = jest.fn(formatNoop);
+    echoSpy = jest.fn(echo);
     warnSpy = jest.spyOn(console, 'warn');
 
     formatters = {
-      'Address': noopSpy,
-      'Address[]': noopSpy,
+      'Address': echoSpy,
+      'Address[]': echoSpy,
       'Exception': () => {
         throw new Error('something went wrong');
       }
@@ -22,7 +22,7 @@ describe('util', () => {
   });
 
   afterEach(() => {
-    noopSpy.mockRestore();
+    echoSpy.mockRestore();
     warnSpy.mockRestore();
   });
 
@@ -35,7 +35,7 @@ describe('util', () => {
 
     it('logs a warning with unknown types', () => {
       format(formatters, 'Unknown', 'test');
-      expect(warnSpy).toHaveBeenCalledWith("Unable to find default formatter for 'Unknown', falling back to noop");
+      expect(warnSpy).toHaveBeenCalledWith("Unable to find default formatter for 'Unknown', falling back to echo");
     });
 
     it('wraps exceptions with the type', () => {
@@ -48,7 +48,7 @@ describe('util', () => {
       it('formats known types using the supplied formatter', () => {
         format(formatters, 'Address', '0xaddress');
 
-        expect(noopSpy).toHaveBeenCalledWith('0xaddress');
+        expect(echoSpy).toHaveBeenCalledWith('0xaddress');
       });
     });
 
@@ -62,8 +62,8 @@ describe('util', () => {
       it('formats using the primitive type', () => {
         format(formatters, 'Address[]', ['0x123', '0x234']);
 
-        expect(noopSpy).toHaveBeenCalledWith('0x123');
-        expect(noopSpy).toHaveBeenCalledWith('0x234');
+        expect(echoSpy).toHaveBeenCalledWith('0x123');
+        expect(echoSpy).toHaveBeenCalledWith('0x234');
       });
 
       it('returns formatted values as arrays', () => {
diff --git a/packages/api-provider/package.json b/packages/api-provider/package.json
index 6f6133ec62c5..f5ebd6e8dd77 100644
--- a/packages/api-provider/package.json
+++ b/packages/api-provider/package.json
@@ -34,7 +34,7 @@
     "nock": "^9.1.0"
   },
   "dependencies": {
-    "@polkadot/util": "^0.6.7",
+    "@polkadot/util": "^0.9.1",
     "babel-runtime": "^6.26.0",
     "isomorphic-fetch": "^2.2.1",
     "websocket": "^1.0.25"
diff --git a/packages/api-provider/src/ws/index.js b/packages/api-provider/src/ws/index.js
index c4d39942cb74..8c2dcf4fd72e 100644
--- a/packages/api-provider/src/ws/index.js
+++ b/packages/api-provider/src/ws/index.js
@@ -70,7 +70,9 @@ module.exports = class WsProvider extends JsonRpcCoder implements ProviderInterf
 
     Object.keys(this._queued).forEach((id: string) => {
       try {
-        this._websocket.send(this._queued[((id: any): number)]);
+        this._websocket.send(
+          this._queued[((id: any): number)]
+        );
         delete this._queued[((id: any): number)];
       } catch (error) {
         console.error(error);
diff --git a/packages/api/package.json b/packages/api/package.json
index 5d3fef848dac..ec5924459c5d 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -33,7 +33,7 @@
     "@polkadot/api-format": "^0.6.5",
     "@polkadot/api-jsonrpc": "^0.6.5",
     "@polkadot/api-provider": "^0.6.5",
-    "@polkadot/util": "^0.6.7",
+    "@polkadot/util": "^0.9.1",
     "babel-runtime": "^6.26.0"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 3476703c2ccf..1b224c2eb0c2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -54,9 +54,9 @@
     lodash "^4.2.0"
     to-fast-properties "^2.0.0"
 
-"@polkadot/dev@^0.13.3":
-  version "0.13.3"
-  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.13.3.tgz#e90caf191134d233fb6321012914f951b8a3ec17"
+"@polkadot/dev@^0.13.4":
+  version "0.13.4"
+  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.13.4.tgz#beaa45da1655f8335b4a8294db3803f95cd3cc4e"
   dependencies:
     babel-cli "^6.26.0"
     babel-core "^6.26.0"
@@ -80,7 +80,7 @@
     eslint-plugin-promise "^3.6.0"
     eslint-plugin-react "^7.4.0"
     eslint-plugin-standard "^3.0.1"
-    flow-bin "^0.60.0"
+    flow-bin "^0.61.0"
     flow-copy-source "^1.2.1"
     jest "^21.2.1"
     makeshift "^1.1.0"
@@ -91,31 +91,28 @@
     stylelint "^8.2.0"
     stylelint-config-standard "^18.0.0"
 
-"@polkadot/primitives-json@^0.1.5":
-  version "0.1.5"
-  resolved "https://registry.yarnpkg.com/@polkadot/primitives-json/-/primitives-json-0.1.5.tgz#bd3f1dc2532190ebf78ba9d89f64b518d105eae8"
+"@polkadot/primitives-json@^0.3.1":
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/@polkadot/primitives-json/-/primitives-json-0.3.1.tgz#7c18589b944d792019ed08155363a29504604d23"
   dependencies:
-    "@polkadot/primitives" "^0.1.5"
-    "@polkadot/util" "^0.6.8"
-
-"@polkadot/primitives@^0.1.5":
-  version "0.1.5"
-  resolved "https://registry.yarnpkg.com/@polkadot/primitives/-/primitives-0.1.5.tgz#6eb2fbccb06bda8bd774d205528d9b3a1d3e0b21"
+    "@polkadot/primitives" "^0.3.1"
+    "@polkadot/util" "^0.9.1"
+    babel-runtime "^6.26.0"
 
-"@polkadot/util@^0.6.7":
-  version "0.6.7"
-  resolved "https://registry.yarnpkg.com/@polkadot/util/-/util-0.6.7.tgz#eb9a6bd3717b69c962f6fb70830ebc60380c333f"
+"@polkadot/primitives@^0.3.1":
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/@polkadot/primitives/-/primitives-0.3.1.tgz#420220a8e9c3118f613e47218b038ca7c3724922"
   dependencies:
+    "@polkadot/util" "^0.9.1"
     babel-runtime "^6.26.0"
-    bn.js "^4.11.8"
-    keccak "^1.3.0"
 
-"@polkadot/util@^0.6.8":
-  version "0.6.10"
-  resolved "https://registry.yarnpkg.com/@polkadot/util/-/util-0.6.10.tgz#09417e607ec64a404ae63fa64f8f008d91c79856"
+"@polkadot/util@^0.9.1":
+  version "0.9.1"
+  resolved "https://registry.yarnpkg.com/@polkadot/util/-/util-0.9.1.tgz#222a31f0325468044736792bd5652e483b8336db"
   dependencies:
     babel-runtime "^6.26.0"
     bn.js "^4.11.8"
+    ip-regex "^2.1.0"
     keccak "^1.3.0"
 
 JSONStream@^1.0.4:
@@ -2105,9 +2102,9 @@ flat-cache@^1.2.1:
     graceful-fs "^4.1.2"
     write "^0.2.1"
 
-flow-bin@^0.60.0:
-  version "0.60.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.60.0.tgz#885d0d92a90f94c29445e0f9a0382f5b5debaaed"
+flow-bin@^0.61.0:
+  version "0.61.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.61.0.tgz#d0473a8c35dbbf4de573823f4932124397d32d35"
 
 flow-copy-source@^1.2.1:
   version "1.2.1"
@@ -2601,6 +2598,10 @@ invert-kv@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/invert-kv/-/invert-kv-1.0.0.tgz#104a8e4aaca6d3d8cd157a8ef8bfab2d7a3ffdb6"
 
+ip-regex@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/ip-regex/-/ip-regex-2.1.0.tgz#fa78bf5d2e6913c911ce9f819ee5146bb6d844e9"
+
 is-alphabetical@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-alphabetical/-/is-alphabetical-1.0.1.tgz#c77079cc91d4efac775be1034bf2d243f95e6f08"