diff --git a/package-lock.json b/package-lock.json
index 6de74f7..eabb230 100644
--- a/package-lock.json
+++ b/package-lock.json
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+        "web3-core": "1.2.0",
+        "web3-core-method": "1.2.0",
+        "web3-core-subscriptions": "1.2.0",
+        "web3-net": "1.2.0"
       }
     },
     "web3-utils": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.2.1.tgz",
-      "integrity": "sha512-Mrcn3l58L+yCKz3zBryM6JZpNruWuT0OCbag8w+reeNROSGVlXzUQkU+gtAwc9JCZ7tKUyg67+2YUGqUjVcyBA==",
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.2.0.tgz",
+      "integrity": "sha512-tI1low8ICoaWU2c53cikH0rsksKuIskI2nycH5E5sEXxxl9/BOD3CeDDBFbxgNPQ+bpDevbR7gXNEDB7Ud4G9g==",
       "requires": {
         "bn.js": "4.11.8",
         "eth-lib": "0.2.7",
@@ -11329,9 +11236,9 @@
       "integrity": "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg=="
     },
     "webpack": {
-      "version": "4.39.3",
-      "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.39.3.tgz",
-      "integrity": "sha512-BXSI9M211JyCVc3JxHWDpze85CvjC842EvpRsVTc/d15YJGlox7GIDd38kJgWrb3ZluyvIjgenbLDMBQPDcxYQ==",
+      "version": "4.39.2",
+      "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.39.2.tgz",
+      "integrity": "sha512-AKgTfz3xPSsEibH00JfZ9sHXGUwIQ6eZ9tLN8+VLzachk1Cw2LVmy+4R7ZiwTa9cZZ15tzySjeMui/UnSCAZhA==",
       "dev": true,
       "requires": {
         "@webassemblyjs/ast": "1.8.5",
@@ -11359,12 +11266,6 @@
         "webpack-sources": "^1.4.1"
       },
       "dependencies": {
-        "acorn": {
-          "version": "6.3.0",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
-          "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
-          "dev": true
-        },
         "ajv": {
           "version": "6.10.2",
           "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
@@ -11464,6 +11365,12 @@
             "has-flag": "^3.0.0"
           }
         },
+        "v8-compile-cache": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.0.3.tgz",
+          "integrity": "sha512-CNmdbwQMBjwr9Gsmohvm0pbL954tJrNzf6gWL3K+QMQf00PF7ERGrEiLgjuU3mKreLC2MeGhUsNV9ybTbLgd3w==",
+          "dev": true
+        },
         "wrap-ansi": {
           "version": "5.1.0",
           "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-5.1.0.tgz",
@@ -11507,12 +11414,12 @@
       }
     },
     "webpack-merge": {
-      "version": "4.2.2",
-      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-4.2.2.tgz",
-      "integrity": "sha512-TUE1UGoTX2Cd42j3krGYqObZbOD+xF7u28WB7tfUordytSjbWTIjK/8V0amkBfTYN4/pB/GIDlJZZ657BGG19g==",
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-4.2.1.tgz",
+      "integrity": "sha512-4p8WQyS98bUJcCvFMbdGZyZmsKuWjWVnVHnAS3FFg0HDaRVrPbkivx2RYCre8UiemD67RsiFFLfn4JhLAin8Vw==",
       "dev": true,
       "requires": {
-        "lodash": "^4.17.15"
+        "lodash": "^4.17.5"
       }
     },
     "webpack-sources": {
diff --git a/src/Instantiable.abstract.ts b/src/Instantiable.abstract.ts
index 4e04861..3171831 100644
--- a/src/Instantiable.abstract.ts
+++ b/src/Instantiable.abstract.ts
@@ -66,6 +66,7 @@ export abstract class Instantiable {
     }
 
     public static async getInstance(...args: any[]): Promise<any>
+
     public static async getInstance(config: InstantiableConfig): Promise<any> {
         LoggerInstance.warn(
             'getInstance() methods has needs to be added to child class.'
@@ -83,8 +84,11 @@ export abstract class Instantiable {
     }
 
     private _ocean: Ocean
+
     private _web3: Web3
+
     private _config: Config
+
     private _logger: Logger
 
     protected setInstanceConfig(config: InstantiableConfig) {
diff --git a/src/ddo/DDO.ts b/src/ddo/DDO.ts
index e15de38..6baf9a2 100644
--- a/src/ddo/DDO.ts
+++ b/src/ddo/DDO.ts
@@ -39,10 +39,15 @@ export class DDO {
      * @type {string}
      */
     public id: string = null
+
     public created: string
+
     public publicKey: PublicKey[] = []
+
     public authentication: Authentication[] = []
+
     public service: Service[] = []
+
     public proof: Proof
 
     public constructor(ddo: Partial<DDO> = {}) {
diff --git a/src/keeper/EventHandler.ts b/src/keeper/EventHandler.ts
index 0ab4626..add7efd 100644
--- a/src/keeper/EventHandler.ts
+++ b/src/keeper/EventHandler.ts
@@ -9,9 +9,13 @@ export class EventHandler extends Instantiable {
     }
 
     private events = new Set<(blockNumber) => void>()
+
     private lastBlock: number
+
     private interval = 200
+
     private polling: boolean = false
+
     private lastTimeout: NodeJS.Timeout
 
     constructor(config: InstantiableConfig) {
diff --git a/src/keeper/contracts/ContractBase.ts b/src/keeper/contracts/ContractBase.ts
index 0c7c6cc..572790d 100644
--- a/src/keeper/contracts/ContractBase.ts
+++ b/src/keeper/contracts/ContractBase.ts
@@ -6,6 +6,7 @@ import { Instantiable, InstantiableConfig } from '../../Instantiable.abstract'
 
 export abstract class ContractBase extends Instantiable {
     protected static instance = null
+
     public contractName: string
 
     private contract: Contract = null
diff --git a/src/keeper/contracts/conditions/Condition.abstract.ts b/src/keeper/contracts/conditions/Condition.abstract.ts
index a3f6605..8fd2df4 100644
--- a/src/keeper/contracts/conditions/Condition.abstract.ts
+++ b/src/keeper/contracts/conditions/Condition.abstract.ts
@@ -36,6 +36,7 @@ export abstract class Condition extends ContractBase {
     }
 
     public fulfill(agreementId: string, ...args: any[])
+
     public fulfill(agreementId: string, args: any[], from?: string) {
         return this.sendFrom('fulfill', [zeroX(agreementId), ...args], from)
     }
diff --git a/src/models/Balance.ts b/src/models/Balance.ts
index 8b70072..f3a67aa 100644
--- a/src/models/Balance.ts
+++ b/src/models/Balance.ts
@@ -1,4 +1,5 @@
 export default class Balance {
     public eth: number
+
     public ocn: number
 }
diff --git a/src/models/Config.ts b/src/models/Config.ts
index 083b6ff..2d7b178 100644
--- a/src/models/Config.ts
+++ b/src/models/Config.ts
@@ -13,6 +13,7 @@ export class Config {
      * @type {string}
      */
     public brizoUri: string
+
     /**
      * Address of Brizo.
      * @type {string}
@@ -24,6 +25,7 @@ export class Config {
      * @type {string}
      */
     public nodeUri?: string
+
     /**
      * Web3 Provider.
      * @type {any}
@@ -56,6 +58,7 @@ export class Config {
 
     // Parity config
     public parityUri?: string
+
     public threshold?: number
 }
 
diff --git a/src/models/InputType.ts b/src/models/InputType.ts
index 7d7dee0..04bb103 100644
--- a/src/models/InputType.ts
+++ b/src/models/InputType.ts
@@ -1,4 +1,5 @@
 export default class InputType {
     public name: string
+
     public type: string
 }
diff --git a/src/models/MethodReflection.ts b/src/models/MethodReflection.ts
index 764b8d5..58bd488 100644
--- a/src/models/MethodReflection.ts
+++ b/src/models/MethodReflection.ts
@@ -2,8 +2,12 @@ import InputType from './InputType'
 
 export default class MethodReflection {
     public contractName: string
+
     public methodName: string
+
     public address: string
+
     public signature: string
+
     public inputs: InputType[]
 }
diff --git a/src/models/ValuePair.ts b/src/models/ValuePair.ts
index 6a5e358..cd69d5b 100644
--- a/src/models/ValuePair.ts
+++ b/src/models/ValuePair.ts
@@ -1,4 +1,5 @@
 export default class ValuePair {
     public type: string
+
     public value: any
 }
diff --git a/src/ocean/Account.ts b/src/ocean/Account.ts
index 62c2d01..b33e4ec 100644
--- a/src/ocean/Account.ts
+++ b/src/ocean/Account.ts
@@ -8,6 +8,7 @@ import { Instantiable, InstantiableConfig } from '../Instantiable.abstract'
  */
 export default class Account extends Instantiable {
     private password?: string
+
     private token?: string
 
     constructor(private id: string = '0x0', config?: InstantiableConfig) {
diff --git a/src/utils/SubscribableObserver.ts b/src/utils/SubscribableObserver.ts
index d89fe36..8cf9cde 100644
--- a/src/utils/SubscribableObserver.ts
+++ b/src/utils/SubscribableObserver.ts
@@ -1,5 +1,6 @@
 export class SubscribableObserver<T, P> {
     public completed: boolean = false
+
     private subscriptions = new Set<{
         onNext?: (next: T) => void
         onComplete?: (complete: P) => void
diff --git a/src/utils/SubscribablePromise.ts b/src/utils/SubscribablePromise.ts
index 68b0048..8ff0d12 100644
--- a/src/utils/SubscribablePromise.ts
+++ b/src/utils/SubscribablePromise.ts
@@ -2,6 +2,7 @@ import { SubscribableObserver } from './SubscribableObserver'
 
 export class SubscribablePromise<T extends any, P extends any> {
     private observer = new SubscribableObserver<T, P>()
+
     private promise = Object.assign(
         new Promise<P>((resolve, reject) => {
             setTimeout(() => {