diff --git a/src/utils/download.ts b/src/utils/download.ts
index 94f6fd6..767f2e7 100644
--- a/src/utils/download.ts
+++ b/src/utils/download.ts
@@ -1,8 +1,8 @@
 import GitlyOptions from '../interfaces/options'
 
-import fetch from './fetch'
 import execute from './execute'
 import exists from './exists'
+import fetch from './fetch'
 import { isOffline } from './offline'
 import parse from './parse'
 import { getFile, getUrl } from './tar'
@@ -11,7 +11,6 @@ import { getFile, getUrl } from './tar'
  * Download the tar file from the repository
  * and store it in a temporary directory
  * @param repository The repository to download
- * @param options
  *
  * @example
  * ```js
@@ -23,7 +22,7 @@ import { getFile, getUrl } from './tar'
 export default async function download(
   repository: string,
   options: GitlyOptions = {}
-) {
+): Promise<string> {
   const info = parse(repository, options)
   const file = getFile(info, options)
   const url = getUrl(info, options)
diff --git a/src/utils/exists.ts b/src/utils/exists.ts
index 93afde6..52310f0 100644
--- a/src/utils/exists.ts
+++ b/src/utils/exists.ts
@@ -6,13 +6,17 @@ import GitlyOptions from '../interfaces/options'
 import parse from './parse'
 import { getFile } from './tar'
 
-export default async (path: string, options: GitlyOptions = {}) => {
+export default async function exists(
+  path: string,
+  options: GitlyOptions = {}
+): Promise<boolean> {
   if (!isAbsolute(path)) {
     path = getFile(parse(path), options)
   }
   try {
     await fs.access(path, constants.F_OK)
     return true
-  } catch (_) { }
+    // eslint-disable-next-line no-empty
+  } catch (_) {}
   return false
 }
diff --git a/src/utils/extract.ts b/src/utils/extract.ts
index 0972fed..3873ecc 100644
--- a/src/utils/extract.ts
+++ b/src/utils/extract.ts
@@ -1,6 +1,5 @@
 import { promises as fs } from 'fs'
 import { resolve } from 'path'
-import { FileStat } from 'tar'
 
 import GitlyOptions from '../interfaces/options'
 
@@ -16,16 +15,23 @@ const { mkdir } = fs
  * @param options
  *
  */
-export default async (source: string, destination: string, options: GitlyOptions = {}) => {
+export default async (
+  source: string,
+  destination: string,
+  options: GitlyOptions = {}
+): Promise<string> => {
   destination = resolve(destination)
   if (await exists(source, options)) {
     try {
-      let filter = (options.extract && options.extract.filter) ? options.extract.filter :
-        (_path: string, _stat: FileStat) => true
+      const filter =
+        options.extract && options.extract.filter
+          ? options.extract.filter
+          : () => true
       await mkdir(destination, { recursive: true })
       await extract({ strip: 1, filter, file: source, cwd: destination })
       return destination
-    } catch (_) { }
+      // eslint-disable-next-line no-empty
+    } catch (_) {}
   }
   return ''
 }
diff --git a/src/utils/gitly.ts b/src/utils/gitly.ts
index 825a4dc..4446c90 100644
--- a/src/utils/gitly.ts
+++ b/src/utils/gitly.ts
@@ -1,4 +1,5 @@
 import GitlyOptions from '../interfaces/options'
+
 import download from './download'
 import extract from './extract'
 
@@ -6,7 +7,6 @@ import extract from './extract'
  * Downloads and extracts the repository
  * @param repository The repository to download
  * @param destination The destination to extract
- * @param options
  * @returns A tuple with the source and destination respectively
  */
 export default async function gitly(
diff --git a/src/utils/offline.ts b/src/utils/offline.ts
index 42cb2eb..d2eed70 100644
--- a/src/utils/offline.ts
+++ b/src/utils/offline.ts
@@ -4,6 +4,7 @@ export async function isOffline(): Promise<boolean> {
   try {
     await lookup('google.com')
     return false
-  } catch (_) { }
+    // eslint-disable-next-line no-empty
+  } catch (_) {}
   return true
 }
diff --git a/src/utils/parse.ts b/src/utils/parse.ts
index f086ae8..0bc7a77 100644
--- a/src/utils/parse.ts
+++ b/src/utils/parse.ts
@@ -18,15 +18,15 @@ import URLInfo from '../interfaces/url'
  * ```
  */
 export default (url: string, options: GitlyOptions = {}): URLInfo => {
-  let { url: normalized, host } = normalizeURL(url, options)
+  const { url: normalized, host } = normalizeURL(url, options)
 
   // Parse the url
   const result = parse(normalized)
-  const paths = (result.path || '').split('/').filter(p => !!p)
+  const paths = (result.path || '').split('/').filter((p) => !!p)
   const owner = paths.shift() || ''
   const repository = paths.shift() || ''
   return {
-    protocol: (result.protocol || 'https').replace(/\:/g, ''),
+    protocol: (result.protocol || 'https').replace(/:/g, ''),
     host: result.host || host || 'github.com',
     hostname: (result.hostname || host || 'github').replace(/\.(\S+)/, ''),
     hash: result.hash || '',
@@ -34,23 +34,23 @@ export default (url: string, options: GitlyOptions = {}): URLInfo => {
     path: result.path || '',
     repository,
     owner,
-    type: (result.hash || '#master').substr(1)
+    type: (result.hash || '#master').substr(1),
   }
 }
 
-function normalizeURL(url: string, options: any) {
+function normalizeURL(url: string, options: GitlyOptions) {
   // Remove 'www.'
   url = url.replace('www.', '')
   // Remove '.git'
   url = url.replace('.git', '')
-  const httpRegex = /http(s)?\:\/\//
+  const httpRegex = /http(s)?:\/\//
   const tldRegex = /[\S]+\.([\D]+)/
   let host = options.host || ''
-  if (/([\S]+)\:.+/.test(url) && !httpRegex.test(url)) {
+  if (/([\S]+):.+/.test(url) && !httpRegex.test(url)) {
     /**
      * Matches host:owner/repo
      */
-    const matches = url.match(/([\S]+)\:.+/)
+    const matches = url.match(/([\S]+):.+/)
     // Get the host
     host = matches ? matches[1] : ''
     // Remove the host from the url
@@ -68,10 +68,10 @@ function normalizeURL(url: string, options: any) {
      */
 
     // Get the TLD if any
-    const matches = (options.host as string || '').match(tldRegex)
+    const matches = ((options.host as string) || '').match(tldRegex)
     let match = 'com'
     if (matches) match = matches[1]
-    let domain = (options.host || 'github')
+    let domain = options.host || 'github'
     domain = domain.replace(`.${match}`, '')
 
     url = `https://${domain}.${match}/${url}`
diff --git a/src/utils/tar.ts b/src/utils/tar.ts
index 248dfe4..b8ed6aa 100644
--- a/src/utils/tar.ts
+++ b/src/utils/tar.ts
@@ -5,7 +5,7 @@ import tar = require('tar')
 import GitlyOptions from '../interfaces/options'
 import URLInfo from '../interfaces/url'
 
-export function getUrl(info: URLInfo, options: GitlyOptions = {}) {
+export function getUrl(info: URLInfo, options: GitlyOptions = {}): string {
   const { path: repo, type } = info
 
   if (options.url && options.url.filter) {
@@ -22,9 +22,14 @@ export function getUrl(info: URLInfo, options: GitlyOptions = {}) {
   }
 }
 
-export function getFile(info: URLInfo, options: GitlyOptions = {}) {
+export function getFile(info: URLInfo, options: GitlyOptions = {}): string {
   const { path, type, hostname: site } = info
-  return join(options.temp || join(os.homedir(), '.gitly'), site, path, `${type}.tar.gz`)
+  return join(
+    options.temp || join(os.homedir(), '.gitly'),
+    site,
+    path,
+    `${type}.tar.gz`
+  )
 }
 
 export const extract = tar.extract
diff --git a/src/utils/write.ts b/src/utils/write.ts
index dd7eb7b..8351fd0 100644
--- a/src/utils/write.ts
+++ b/src/utils/write.ts
@@ -1,3 +1,4 @@
+import { WriteStream } from 'fs'
 import { createWriteStream, promises as fs } from 'fs'
 import { dirname, normalize } from 'path'
 
@@ -6,7 +7,7 @@ const { mkdir } = fs
  * Create a folder and return a writable stream.
  * @param path The path to write a file
  */
-export default async (path: string) => {
+export default async function write(path: string): Promise<WriteStream> {
   path = normalize(path)
   await mkdir(dirname(path), { recursive: true })
   return createWriteStream(path)