diff --git a/.github/scripts/lib/github-api.mjs b/.github/scripts/lib/github-api.js
similarity index 100%
rename from .github/scripts/lib/github-api.mjs
rename to .github/scripts/lib/github-api.js
diff --git a/.github/scripts/lib/render-projects.mjs b/.github/scripts/lib/render-projects.js
similarity index 92%
rename from .github/scripts/lib/render-projects.mjs
rename to .github/scripts/lib/render-projects.js
index 367e38d..4393869 100644
--- a/.github/scripts/lib/render-projects.mjs
+++ b/.github/scripts/lib/render-projects.js
@@ -3,7 +3,7 @@
 /**
  * Public URL of a repo: its declared homepage, else its GitHub Pages URL when
  * Pages is enabled. Returns an empty string when the repo has neither.
- * @param {import("./github-api.mjs").Repo} repo
+ * @param {import("./github-api.js").Repo} repo
  * @returns {string}
  */
 export function resolveUrl(repo) {
@@ -48,7 +48,7 @@ function table(headers, rows) {
 
 /**
  * Repos with at least one star, most-starred first.
- * @param {import("./github-api.mjs").Repo[]} repos
+ * @param {import("./github-api.js").Repo[]} repos
  * @returns {string[]}
  */
 export function renderStarred(repos) {
@@ -63,7 +63,7 @@ export function renderStarred(repos) {
 
 /**
  * Repos with a live demo URL.
- * @param {import("./github-api.mjs").Repo[]} repos
+ * @param {import("./github-api.js").Repo[]} repos
  * @returns {string[]}
  */
 export function renderDemo(repos) {
@@ -77,7 +77,7 @@ export function renderDemo(repos) {
 
 /**
  * Repos owned by others, by merged pull request count.
- * @param {import("./github-api.mjs").Contribution[]} contributions
+ * @param {import("./github-api.js").Contribution[]} contributions
  * @returns {string[]}
  */
 export function renderContributed(contributions) {
diff --git a/.github/scripts/update-projects-list.mjs b/.github/scripts/update-projects-list.js
similarity index 94%
rename from .github/scripts/update-projects-list.mjs
rename to .github/scripts/update-projects-list.js
index 16518e5..4b70b69 100644
--- a/.github/scripts/update-projects-list.mjs
+++ b/.github/scripts/update-projects-list.js
@@ -15,14 +15,14 @@
 import fs from "node:fs/promises";
 import path from "node:path";
 
-import { GitHubProjects } from "./lib/github-api.mjs";
+import { GitHubProjects } from "./lib/github-api.js";
 import {
   injectBlock,
   renderContributed,
   renderDemo,
   renderStarred,
   resolveUrl,
-} from "./lib/render-projects.mjs";
+} from "./lib/render-projects.js";
 
 const PAGE = "content/page/projects/index.md";
 
@@ -33,8 +33,8 @@ const UNSTABLE_OWNERS = new Set(["tiennm99dev"]);
 
 /**
  * Most recently pushed first; a repo with no timestamp sorts last.
- * @param {import("./lib/github-api.mjs").Repo} a
- * @param {import("./lib/github-api.mjs").Repo} b
+ * @param {import("./lib/github-api.js").Repo} a
+ * @param {import("./lib/github-api.js").Repo} b
  * @returns {number}
  */
 const byRecentPush = (a, b) => (b.pushedAt || "").localeCompare(a.pushedAt || "");
diff --git a/.github/workflows/update-projects.yml b/.github/workflows/update-projects.yml
index c2a609b..6f0b548 100644
--- a/.github/workflows/update-projects.yml
+++ b/.github/workflows/update-projects.yml
@@ -38,7 +38,7 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.PAGES_FETCH_TOKEN }}
           GH_USER: tiennm99
-        run: node .github/scripts/update-projects-list.mjs
+        run: node .github/scripts/update-projects-list.js
 
       - name: Commit and push
         run: |
diff --git a/package.json b/package.json
index 5ecc48d..c6a8e1b 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   },
   "scripts": {
     "lint": "eslint .",
-    "projects:refresh": "node .github/scripts/update-projects-list.mjs"
+    "projects:refresh": "node .github/scripts/update-projects-list.js"
   },
   "dependencies": {
     "octokit": "^5.0.5"