diff --git a/frontend/admin/src/components/Buttons/GridButtons.tsx b/frontend/admin/src/components/Buttons/GridButtons.tsx
index f236f8b..28f1c02 100644
--- a/frontend/admin/src/components/Buttons/GridButtons.tsx
+++ b/frontend/admin/src/components/Buttons/GridButtons.tsx
@@ -1,10 +1,9 @@
-import React, { useState } from 'react'
-
-import { createStyles, makeStyles, Theme } from '@material-ui/core/styles'
-import Box from '@material-ui/core/Box'
-import { Button } from '@material-ui/core'
-import { useTranslation } from 'react-i18next'
 import { ConfirmPopover } from '@components/Confirm'
+import { Button } from '@material-ui/core'
+import Box from '@material-ui/core/Box'
+import { createStyles, makeStyles, Theme } from '@material-ui/core/styles'
+import React, { useState } from 'react'
+import { useTranslation } from 'react-i18next'
 
 const useStyles = makeStyles((theme: Theme) =>
   createStyles({
@@ -38,6 +37,7 @@ const GridButtons: React.FC<IGridButtonProps> = ({
   const onClickDelete = async (event: React.MouseEvent<HTMLButtonElement>) => {
     event.preventDefault()
     handleDelete(id)
+    setAnchorEl(null)
   }
 
   const handlePopover = (target: HTMLButtonElement | null) => {
diff --git a/frontend/portal/next.config.js b/frontend/portal/next.config.js
index e155860..502e4c9 100644
--- a/frontend/portal/next.config.js
+++ b/frontend/portal/next.config.js
@@ -1,7 +1,7 @@
 const { i18n } = require('./next-i18next.config')
 const { PHASE_DEVELOPMENT_SERVER } = require('next/constants')
 
-const port = process.env.PORT || 3000
+const port = process.env.PORT
 const serverApiUrl = process.env.SERVER_API_URL || 'http://localhost:8000'
 const siteId = process.env.SITE_ID || '3'
 const mode = siteId === '2' ? 'lg' : siteId === '3' ? 'sm' : 'sm'
diff --git a/frontend/portal/src/constants/env.ts b/frontend/portal/src/constants/env.ts
index 4f2397a..39f6b6e 100644
--- a/frontend/portal/src/constants/env.ts
+++ b/frontend/portal/src/constants/env.ts
@@ -1,6 +1,6 @@
 export const DEV = process.env.NODE_ENV !== 'production'
 
-export const PORT = process.env.PORT || '3000'
+export const PORT = process.env.PORT
 export const PROXY_HOST = process.env.PROXY_HOST || `http://localhost:${PORT}`
 
 export const TZ = process.env.TZ || 'Asia/Seoul'