diff --git a/next.config.static.ts b/next.config.static.ts
index 0fdb9e91c..4684414b4 100644
--- a/next.config.static.ts
+++ b/next.config.static.ts
@@ -8,8 +8,7 @@ const withMDX = createMDX();
 const isGitHubPagesBuild =
   process.env.GITHUB_ACTIONS === 'true' || process.env.GITHUB_PAGES === 'true';
 const isVercelBuild = process.env.VERCEL === '1';
-const isVercelProd =
-  isVercelBuild && !['development', 'staging'].includes(process.env.VERCEL_ENV ?? '');
+const isVercelProd = isVercelBuild && resolveBaseUrl().startsWith('https://docs.ton.org');
 const isLocalBuild = !isGitHubPagesBuild && !isVercelBuild;
 let gitRepoMatch: RegExpMatchArray | null = null;
 try {
@@ -21,7 +20,7 @@ try {
   gitRepoMatch = gitUrl.match(/(?:github\.com[:/])(.+?)\/(.+?)(?:\.git)?$/);
 } catch {}
 
-const resolveBaseUrl = () => {
+function resolveBaseUrl() {
   const publicUrl = process.env.NEXT_PUBLIC_SITE_URL;
   if (publicUrl !== undefined && publicUrl !== '') {
     return publicUrl;
@@ -34,7 +33,7 @@ const resolveBaseUrl = () => {
   return 'http://localhost:3000';
 };
 
-const resolveBasePath = () => {
+function resolveBasePath() {
   if (isGitHubPagesBuild) {
     return `/${gitConfig.repo}`;
   }
diff --git a/next.config.vercel.ts b/next.config.vercel.ts
index 26e163b0d..1a6a4288c 100644
--- a/next.config.vercel.ts
+++ b/next.config.vercel.ts
@@ -5,13 +5,13 @@ import type { Redirect } from 'next/dist/lib/load-custom-routes';
 import { createMDX } from 'fumadocs-mdx/next';
 
 const withMDX = createMDX();
-const isVercelProd = !['development', 'staging'].includes(process.env.VERCEL_ENV ?? '');
+const isVercelProd = resolveBaseUrl().startsWith('https://docs.ton.org');
 
 type DocsConfig = {
   redirects?: Redirect[];
 };
 
-const resolveBaseUrl = () => {
+function resolveBaseUrl() {
   const publicUrl = process.env.NEXT_PUBLIC_SITE_URL;
   if (publicUrl !== undefined && publicUrl !== '') {
     return publicUrl;
@@ -22,15 +22,15 @@ const resolveBaseUrl = () => {
   }
 
   return 'http://localhost:3000';
-};
+}
 
-const loadDocsRedirects = (): Redirect[] => {
+function loadDocsRedirects(): Redirect[] {
   const docsConfig = JSON.parse(
-    readFileSync(new URL('./docs.json', import.meta.url), 'utf8'),
+    readFileSync(new URL('./docs.json', import.meta.url), 'utf8')
   ) as DocsConfig;
 
   return docsConfig.redirects ?? [];
-};
+}
 
 const config: NextConfig = {
   reactStrictMode: true,