diff --git a/components/custom-head/index.js b/components/custom-head/index.js
index 0510677..34adec7 100644
--- a/components/custom-head/index.js
+++ b/components/custom-head/index.js
@@ -1,3 +1,4 @@
+import { isDev } from 'env'
 import NextHead from 'next/head'
 
 export function CustomHead({ title = '', description, image, keywords }) {
@@ -9,7 +10,7 @@ export function CustomHead({ title = '', description, image, keywords }) {
         <meta
           name="robots"
           content={
-            process.env.NODE_ENV !== 'development'
+            isDev
               ? 'index,follow'
               : 'noindex,nofollow'
           }
@@ -17,7 +18,7 @@ export function CustomHead({ title = '', description, image, keywords }) {
         <meta
           name="googlebot"
           content={
-            process.env.NODE_ENV !== 'development'
+            isDev
               ? 'index,follow'
               : 'noindex,nofollow'
           }
diff --git a/env/index.js b/env/index.js
new file mode 100644
index 0000000..0a346c5
--- /dev/null
+++ b/env/index.js
@@ -0,0 +1 @@
+export const isDev = process.env.NODE_ENV === 'development'
diff --git a/package.json b/package.json
index 06007f8..6c9c821 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aniso",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "private": true,
   "scripts": {
     "dev": "next dev --turbopack",
diff --git a/pages/_document.js b/pages/_document.js
index d9297be..3ec8bd9 100644
--- a/pages/_document.js
+++ b/pages/_document.js
@@ -1,9 +1,10 @@
 /* eslint-disable @next/next/no-document-import-in-page */
+import { isDev } from 'env'
 import { Head, Html, Main, NextScript } from 'next/document'
 
 export default function Document() {
   return (
-    <Html lang="en" className={process.env.NODE_ENV === 'development' && 'dev'}>
+    <Html lang="en" className={isDev ? 'dev' : null}>
       <Head>
         <meta charSet="UTF-8" />
       </Head>
