diff --git a/src/hooks/usePublish/usePublish.ts b/src/hooks/usePublish/usePublish.ts
index 2fc88ee..de99aa7 100644
--- a/src/hooks/usePublish/usePublish.ts
+++ b/src/hooks/usePublish/usePublish.ts
@@ -8,7 +8,7 @@ import { useState } from 'react'
 import { DataTokenOptions } from './DataTokenOptions'
 import { useOcean } from 'providers'
 import ProviderStatus from 'providers/OceanProvider/ProviderStatus'
-import { publishFeedback , sleep } from 'utils'
+import { publishFeedback, sleep } from 'utils'
 
 interface UsePublish {
   publish: (
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 5483e6c..5106ca7 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -40,7 +40,7 @@ export const publishFeedback: { [key in number]: string } = {
 
 export * from './web3'
 
-export function sleep(ms: number) {
+export function sleep(ms: number): Promise<void> {
   return new Promise((resolve) => {
     setTimeout(resolve, ms)
   })