diff --git a/packages/docusaurus-theme-classic/package.json b/packages/docusaurus-theme-classic/package.json
index 26d4201640..78653f0d0d 100644
--- a/packages/docusaurus-theme-classic/package.json
+++ b/packages/docusaurus-theme-classic/package.json
@@ -23,6 +23,9 @@
     "react": "^16.8.4",
     "react-dom": "^16.8.4"
   },
+  "bundledDependencies": [
+    "@docusaurus/utils"
+  ],
   "engines": {
     "node": ">=10.9.0"
   }
diff --git a/packages/docusaurus-theme-classic/src/theme/BlogTagsPostsPage/index.js b/packages/docusaurus-theme-classic/src/theme/BlogTagsPostsPage/index.js
index aaf7ea57a9..1cfc93da76 100644
--- a/packages/docusaurus-theme-classic/src/theme/BlogTagsPostsPage/index.js
+++ b/packages/docusaurus-theme-classic/src/theme/BlogTagsPostsPage/index.js
@@ -11,6 +11,10 @@ import Layout from '@theme/Layout';
 import BlogPostItem from '@theme/BlogPostItem';
 import Link from '@docusaurus/Link';
 
+function pluralize(count, word) {
+  return count > 1 ? `${word}s` : word;
+}
+
 function BlogTagsPostPage(props) {
   const {metadata, items} = props;
   const {allTagsPath, name: tagName, count} = metadata;
@@ -23,7 +27,8 @@ function BlogTagsPostPage(props) {
         <div className="row">
           <div className="col col--8 col--offset-2">
             <h1>
-              {count} post(s) tagged with &quot;{tagName}&quot;
+              {count} {pluralize(count, 'post')} tagged with &quot;{tagName}
+              &quot;
             </h1>
             <Link href={allTagsPath}>View All Tags</Link>
             <div className="margin-vert--xl">
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/index.js b/packages/docusaurus-theme-classic/src/theme/DocSidebar/index.js
index a994194366..f72126d714 100644
--- a/packages/docusaurus-theme-classic/src/theme/DocSidebar/index.js
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/index.js
@@ -11,7 +11,7 @@ import useDocusaurusContext from '@docusaurus/useDocusaurusContext';
 import useBaseUrl from '@docusaurus/useBaseUrl';
 import useLockBodyScroll from '@theme/hooks/useLockBodyScroll';
 import Link from '@docusaurus/Link';
-import isInternalUrl from '@docusaurus/utils'; // eslint-disable-line import/no-extraneous-dependencies
+import isInternalUrl from '@docusaurus/utils';
 
 import styles from './styles.module.css';
 
diff --git a/packages/docusaurus/src/client/exports/utils.js b/packages/docusaurus/src/client/exports/utils.js
index 74ed1a1177..269c9ace70 100644
--- a/packages/docusaurus/src/client/exports/utils.js
+++ b/packages/docusaurus/src/client/exports/utils.js
@@ -4,6 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
+
 export default function isInternalUrl(url) {
   return /^\/(?!\/)/.test(url);
 }