diff --git a/README.md b/README.md
index 7d4bd77f..bc38a1ed 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,7 @@ Above is the minimal configuration to split a large sitemap. When the number of
 | siteUrl                                        | Base url of your website                                                                                                                                                                                                                                                                                                                                          | string         |
 | changefreq (optional)                          | Change frequency. Default `daily`                                                                                                                                                                                                                                                                                                                                 | string         |
 | priority (optional)                            | Priority. Default `0.7`                                                                                                                                                                                                                                                                                                                                           | number         |
-| sitemapBaseFileName (optional)                 | The name of the generated sitemap file before the file extension.  Default `"sitemap"`                                                                                                                                                                                                                                                                            | string         |
+| sitemapBaseFileName (optional)                 | The name of the generated sitemap file before the file extension. Default `"sitemap"`                                                                                                                                                                                                                                                                             | string         |
 | alternateRefs (optional)                       | Denote multi-language support by unique URL. Default `[]`                                                                                                                                                                                                                                                                                                         | AlternateRef[] |
 | sitemapSize(optional)                          | Split large sitemap into multiple files by specifying sitemap size. Default `5000`                                                                                                                                                                                                                                                                                | number         |
 | generateRobotsTxt (optional)                   | Generate a `robots.txt` file and list the generated sitemaps. Default `false`                                                                                                                                                                                                                                                                                     | boolean        |
diff --git a/packages/next-sitemap/src/cli.ts b/packages/next-sitemap/src/cli.ts
index 225cd88c..405c1c9d 100644
--- a/packages/next-sitemap/src/cli.ts
+++ b/packages/next-sitemap/src/cli.ts
@@ -36,7 +36,11 @@ import { exportRobotsTxt } from './robots-txt'
 
   // Split sitemap into multiple files
   const chunks = toChunks(urlSet, config.sitemapSize!)
-  const sitemapChunks = resolveSitemapChunks(runtimePaths.SITEMAP_FILE, chunks, config)
+  const sitemapChunks = resolveSitemapChunks(
+    runtimePaths.SITEMAP_FILE,
+    chunks,
+    config
+  )
 
   // All sitemaps array to keep track of generated sitemap files.
   // Later to be added on robots.txt
diff --git a/packages/next-sitemap/src/config/index.ts b/packages/next-sitemap/src/config/index.ts
index 76bb8d60..2d05abb4 100644
--- a/packages/next-sitemap/src/config/index.ts
+++ b/packages/next-sitemap/src/config/index.ts
@@ -31,7 +31,7 @@ export const defaultConfig: Partial<IConfig> = {
   sourceDir: '.next',
   outDir: 'public',
   priority: 0.7,
-  sitemapBaseFileName: "sitemap",
+  sitemapBaseFileName: 'sitemap',
   changefreq: 'daily',
   sitemapSize: 5000,
   autoLastmod: true,
diff --git a/packages/next-sitemap/src/interface.ts b/packages/next-sitemap/src/interface.ts
index a65fb9bd..2df1cbf1 100644
--- a/packages/next-sitemap/src/interface.ts
+++ b/packages/next-sitemap/src/interface.ts
@@ -13,7 +13,7 @@ export interface IConfig {
   siteUrl: string
   changefreq: string
   priority: any
-  sitemapBaseFileName?: string;
+  sitemapBaseFileName?: string
   sourceDir?: string
   outDir?: string
   sitemapSize?: number
diff --git a/packages/next-sitemap/src/path/index.ts b/packages/next-sitemap/src/path/index.ts
index cd58aaf0..1014898d 100644
--- a/packages/next-sitemap/src/path/index.ts
+++ b/packages/next-sitemap/src/path/index.ts
@@ -21,7 +21,9 @@ export const resolveSitemapChunks = (
 ): ISitemapChunk[] => {
   const folder = path.dirname(baseSitemapPath)
   return chunks.map((chunk, index) => {
-    const filename = `${config.sitemapBaseFileName}${index > 0 ? `-${index}` : ''}.xml`
+    const filename = `${config.sitemapBaseFileName}${
+      index > 0 ? `-${index}` : ''
+    }.xml`
 
     return {
       path: `${folder}/${filename}`,