diff --git a/package.json b/package.json
index 338e3ab7..1a372575 100644
--- a/package.json
+++ b/package.json
@@ -43,12 +43,12 @@
   "scripts": {
     "build": "rollup -c",
     "build:watch": "rollup -c --watch",
-    "lint": "eslint --ext .ts,.js,.cjs .",
-    "lint:fix": "eslint --ext .ts,.js,.cjs --fix .",
+    "lint": "eslint --ext .ts,.js,.cjs,.mjs .",
+    "lint:fix": "eslint --ext .ts,.js,.cjs,.mjs --fix .",
     "test": "jest",
     "test:watch": "jest --watch",
     "test:ci": "jest --ci --reporters=default --reporters=jest-junit",
-    "format": "prettier --write './**/*.(ts|js|json)'",
+    "format": "prettier --write './**/*.(ts|js|cjs|mjs|json)'",
     "prepare": "husky install"
   },
   "contributors": [
@@ -79,7 +79,7 @@
     "access": "public"
   },
   "lint-staged": {
-    "*.(cjs|js|ts)": "eslint --fix",
+    "*.(cjs|mjs|js|ts)": "eslint --fix",
     "*.(json)": "prettier --write"
   }
 }
diff --git a/rollup.config.js b/rollup.config.mjs
similarity index 100%
rename from rollup.config.js
rename to rollup.config.mjs
diff --git a/src/presets/ghost-gulp-rollup/generate-programmatic-files.ts b/src/presets/ghost-gulp-rollup/generate-programmatic-files.ts
index dc43e46e..754dc28c 100644
--- a/src/presets/ghost-gulp-rollup/generate-programmatic-files.ts
+++ b/src/presets/ghost-gulp-rollup/generate-programmatic-files.ts
@@ -36,7 +36,7 @@ export function generatePackage(
   options: Options,
   ghostGulpRollupOptions: GhostGulpRollupOptions,
 ): Package {
-  const codeFileTypes = ghostGulpRollupOptions.useTypeScript ? ['ts', 'js', 'cjs'] : ['js', 'cjs'];
+  const codeFileTypes = ghostGulpRollupOptions.useTypeScript ? ['ts', 'js', 'cjs', 'mjs'] : ['js', 'cjs', 'mjs'];
   const codeFileExtensions = codeFileTypes.map((fileType) => `.${fileType}`);
 
   const typecheckScript = ghostGulpRollupOptions.useTypeScript ? `tsc --noEmit` : undefined;
diff --git a/src/presets/ghost-gulp-rollup/get-template-files.ts b/src/presets/ghost-gulp-rollup/get-template-files.ts
index 25035acd..6803a2a9 100644
--- a/src/presets/ghost-gulp-rollup/get-template-files.ts
+++ b/src/presets/ghost-gulp-rollup/get-template-files.ts
@@ -28,9 +28,9 @@ function getConfigTemplateFiles(
     '.gulp.json',
     '.nvmrc',
     'foundryconfig.json',
-    'gulpfile.cjs',
+    'gulpfile.mjs',
     'README.md',
-    'rollup.config.cjs',
+    'rollup.config.mjs',
   ];
 
   if (useTesting) {
diff --git a/template/ghost-gulp-rollup/.eslintrc.cjs.njk b/template/ghost-gulp-rollup/.eslintrc.cjs.njk
index 9d6ba3c4..4e073207 100644
--- a/template/ghost-gulp-rollup/.eslintrc.cjs.njk
+++ b/template/ghost-gulp-rollup/.eslintrc.cjs.njk
@@ -3,6 +3,7 @@ module.exports = {
 
 {% endif %}  parserOptions: {
     ecmaVersion: 2020,
+    extraFileExtensions: ['.cjs', '.mjs'],
     sourceType: 'module',{% if useTypeScript %}
     project: './tsconfig.eslint.json',{% endif %}
   },
@@ -33,7 +34,7 @@ module.exports = {
       },
     },{% else %}
     {
-      files: ['./*.js', './*.cjs'],
+      files: ['./*.js', './*.cjs', './*.mjs'],
       env: {
         node: true,
       },
diff --git a/template/ghost-gulp-rollup/.gulp.json.njk b/template/ghost-gulp-rollup/.gulp.json.njk
index 6cdb49a5..518fce83 100644
--- a/template/ghost-gulp-rollup/.gulp.json.njk
+++ b/template/ghost-gulp-rollup/.gulp.json.njk
@@ -1,5 +1,5 @@
 {
   "flags": {
-    "gulpfile": "gulpfile.cjs"
+    "gulpfile": "gulpfile.mjs"
   }
 }
diff --git a/template/ghost-gulp-rollup/gulpfile.cjs.njk b/template/ghost-gulp-rollup/gulpfile.mjs.njk
similarity index 82%
rename from template/ghost-gulp-rollup/gulpfile.cjs.njk
rename to template/ghost-gulp-rollup/gulpfile.mjs.njk
index 9b9e601b..b062ef1c 100644
--- a/template/ghost-gulp-rollup/gulpfile.cjs.njk
+++ b/template/ghost-gulp-rollup/gulpfile.mjs.njk
@@ -1,17 +1,17 @@
-const fs = require('fs-extra');
-const gulp = require('gulp');{% if styleType == 'less' %}
-const less = require('gulp-less');{% elif styleType == 'scss' %}
-const sass = require('gulp-dart-sass');{% endif %}
-const sourcemaps = require('gulp-sourcemaps');
-const path = require('node:path');
-const buffer = require('vinyl-buffer');
-const source = require('vinyl-source-stream');
-const yargs = require('yargs');
-const { hideBin } = require('yargs/helpers');
+import fs from 'fs-extra'
+import gulp from 'gulp'{% if styleType == 'less' %}
+import less from 'gulp-less'{% elif styleType == 'scss' %}
+import sass from 'gulp-dart-sass'{% endif %}
+import sourcemaps from 'gulp-sourcemaps'
+import path from 'node:path'
+import buffer from 'vinyl-buffer'
+import source from 'vinyl-source-stream'
+import yargs from 'yargs'
+import { hideBin } from 'yargs/helpers'
 
-const rollupStream = require('@rollup/stream');
+import rollupStream from '@rollup/stream'
 
-const rollupConfig = require('./rollup.config.cjs');
+import rollupConfig from './rollup.config.mjs'
 
 /********************/
 /*  CONFIGURATION   */
@@ -71,7 +71,7 @@ async function copyFiles() {
 /**
  * Watch for changes for each build step
  */
-function watch() {
+export function watch() {
   gulp.watch(`${sourceDirectory}/**/*.${sourceFileExtension}`, { ignoreInitial: false }, buildCode);
   gulp.watch(`${stylesDirectory}/**/*.${stylesExtension}`, { ignoreInitial: false }, buildStyles);
   gulp.watch(
@@ -81,7 +81,7 @@ function watch() {
   );
 }
 
-const build = gulp.series(clean, gulp.parallel(buildCode, buildStyles, copyFiles));
+export const build = gulp.series(clean, gulp.parallel(buildCode, buildStyles, copyFiles));
 
 /********************/
 /*      CLEAN       */
@@ -90,7 +90,7 @@ const build = gulp.series(clean, gulp.parallel(buildCode, buildStyles, copyFiles
 /**
  * Remove built files from `dist` folder while ignoring source files
  */
-async function clean() {
+export async function clean() {
   const files = [...staticFiles, 'module'];
 
   if (fs.existsSync(`${stylesDirectory}/${name}.${stylesExtension}`)) {
@@ -129,7 +129,7 @@ function getDataPath() {
 /**
  * Link build to User Data folder
  */
-async function link() {
+export async function link() {
   let destinationDirectory;
   if (fs.existsSync(path.resolve(sourceDirectory, '{{ type }}.json'))) {
     destinationDirectory = '{{ type }}s';
@@ -156,10 +156,3 @@ async function link() {
     await fs.symlink(path.resolve(distDirectory), linkDirectory);
   }
 }
-
-module.exports = {
-  watch,
-  build,
-  clean,
-  link
-};
diff --git a/template/ghost-gulp-rollup/rollup.config.cjs.njk b/template/ghost-gulp-rollup/rollup.config.mjs.njk
similarity index 57%
rename from template/ghost-gulp-rollup/rollup.config.cjs.njk
rename to template/ghost-gulp-rollup/rollup.config.mjs.njk
index b94674ed..f891f990 100644
--- a/template/ghost-gulp-rollup/rollup.config.cjs.njk
+++ b/template/ghost-gulp-rollup/rollup.config.mjs.njk
@@ -1,7 +1,7 @@
-{% if useTypeScript %}const typescript = require('@rollup/plugin-typescript');
-{% endif %}const { nodeResolve } = require ('@rollup/plugin-node-resolve');
+{% if useTypeScript %}import typescript from '@rollup/plugin-typescript';
+{% endif %}import { nodeResolve } from '@rollup/plugin-node-resolve';
 
-module.exports = () => ({
+export default () => ({
   input: 'src/module/{{ name }}.{% if useTypeScript %}ts{% else %}js{% endif %}',
   output: {
     dir: 'dist/module',
diff --git a/template/ghost-gulp-rollup/tsconfig.eslint.json.njk b/template/ghost-gulp-rollup/tsconfig.eslint.json.njk
index ab024eae..e895099e 100644
--- a/template/ghost-gulp-rollup/tsconfig.eslint.json.njk
+++ b/template/ghost-gulp-rollup/tsconfig.eslint.json.njk
@@ -1,4 +1,4 @@
 {
   "extends": "./tsconfig.json",
-  "include": ["src", {% if useTesting %}"test", {% endif %}"*.js", "*.cjs", ".*.js", ".*.cjs"]
+  "include": ["src", {% if useTesting %}"test", {% endif %}"*.js", "*.cjs", "*.mjs", ".*.js", ".*.cjs", ".*.mjs"]
 }
diff --git a/test/presets/ghost-gulp-rollup/generate-programmatic-files.test.ts b/test/presets/ghost-gulp-rollup/generate-programmatic-files.test.ts
index db87090b..1a358ecb 100644
--- a/test/presets/ghost-gulp-rollup/generate-programmatic-files.test.ts
+++ b/test/presets/ghost-gulp-rollup/generate-programmatic-files.test.ts
@@ -95,11 +95,11 @@ describe('generatePackageJSON', () => {
         expect(_package.scripts.typecheck).toBe('tsc --noEmit');
       });
 
-      it('generates lint scripts that lint ts, js, and cjs', () => {
+      it('generates lint scripts that lint ts, js, cjs, and mjs', () => {
         const _package = generatePackage(defaultName, defaultOptions, typescriptOptions);
 
-        expect(_package.scripts.lint).toBe('eslint --ext .ts,.js,.cjs .');
-        expect(_package.scripts['lint:fix']).toBe('eslint --ext .ts,.js,.cjs --fix .');
+        expect(_package.scripts.lint).toBe('eslint --ext .ts,.js,.cjs,.mjs .');
+        expect(_package.scripts['lint:fix']).toBe('eslint --ext .ts,.js,.cjs,.mjs --fix .');
       });
 
       describe('and not git initialization', () => {
@@ -112,18 +112,18 @@ describe('generatePackageJSON', () => {
       describe('and no CSS preprocessor selected', () => {
         const cssOptions = { ...typescriptOptions, styleType: 'css' as const };
 
-        it('generates a format script that formats ts, js, cjs, json, and css', () => {
+        it('generates a format script that formats ts, js, cjs, mjs, json, and css', () => {
           const _package = generatePackage(defaultName, defaultOptions, cssOptions);
 
-          expect(_package.scripts.format).toBe('prettier --write "./**/*.(ts|js|cjs|json|yml|css)"');
+          expect(_package.scripts.format).toBe('prettier --write "./**/*.(ts|js|cjs|mjs|json|yml|css)"');
         });
 
         describe('and git initialization', () => {
-          it('generates a lint-staged configuration for ts, js, cjs, json, and css', () => {
+          it('generates a lint-staged configuration for ts, js, cjs, mjs, json, and css', () => {
             const _package = generatePackage(defaultName, { ...defaultOptions, git: true }, cssOptions);
 
             expect(_package['lint-staged']).toEqual({
-              '*.(ts|js|cjs)': 'eslint --fix',
+              '*.(ts|js|cjs|mjs)': 'eslint --fix',
               '*.(json|yml|css)': 'prettier --write',
             });
           });
@@ -131,12 +131,15 @@ describe('generatePackageJSON', () => {
       });
 
       describe('and less selected as CSS preprocessor', () => {
-        const lessOptions = { ...typescriptOptions, styleType: 'less' as const };
+        const lessOptions = {
+          ...typescriptOptions,
+          styleType: 'less' as const,
+        };
 
         it('generates a format script that formats ts, js, cjs, json, and less', () => {
           const _package = generatePackage(defaultName, defaultOptions, lessOptions);
 
-          expect(_package.scripts.format).toBe('prettier --write "./**/*.(ts|js|cjs|json|yml|less)"');
+          expect(_package.scripts.format).toBe('prettier --write "./**/*.(ts|js|cjs|mjs|json|yml|less)"');
         });
 
         describe('and git initialization', () => {
@@ -144,7 +147,7 @@ describe('generatePackageJSON', () => {
             const _package = generatePackage(defaultName, { ...defaultOptions, git: true }, lessOptions);
 
             expect(_package['lint-staged']).toEqual({
-              '*.(ts|js|cjs)': 'eslint --fix',
+              '*.(ts|js|cjs|mjs)': 'eslint --fix',
               '*.(json|yml|less)': 'prettier --write',
             });
           });
@@ -152,12 +155,15 @@ describe('generatePackageJSON', () => {
       });
 
       describe('and sass selected as CSS preprocessor', () => {
-        const sassOptions = { ...typescriptOptions, styleType: 'scss' as const };
+        const sassOptions = {
+          ...typescriptOptions,
+          styleType: 'scss' as const,
+        };
 
         it('generates a format script that formats ts, js, cjs, json, and scss', () => {
           const _package = generatePackage(defaultName, defaultOptions, sassOptions);
 
-          expect(_package.scripts.format).toBe('prettier --write "./**/*.(ts|js|cjs|json|yml|scss)"');
+          expect(_package.scripts.format).toBe('prettier --write "./**/*.(ts|js|cjs|mjs|json|yml|scss)"');
         });
 
         describe('and git initialization', () => {
@@ -165,7 +171,7 @@ describe('generatePackageJSON', () => {
             const _package = generatePackage(defaultName, { ...defaultOptions, git: true }, sassOptions);
 
             expect(_package['lint-staged']).toEqual({
-              '*.(ts|js|cjs)': 'eslint --fix',
+              '*.(ts|js|cjs|mjs)': 'eslint --fix',
               '*.(json|yml|scss)': 'prettier --write',
             });
           });
@@ -179,17 +185,20 @@ describe('generatePackageJSON', () => {
       it('generates lint scripts that lint js and cjs', () => {
         const _package = generatePackage(defaultName, defaultOptions, noTypescriptOptions);
 
-        expect(_package.scripts.lint).toBe('eslint --ext .js,.cjs .');
-        expect(_package.scripts['lint:fix']).toBe('eslint --ext .js,.cjs --fix .');
+        expect(_package.scripts.lint).toBe('eslint --ext .js,.cjs,.mjs .');
+        expect(_package.scripts['lint:fix']).toBe('eslint --ext .js,.cjs,.mjs --fix .');
       });
 
       describe('and no CSS preprocessor selected', () => {
-        const cssOptions = { ...noTypescriptOptions, styleType: 'css' as const };
+        const cssOptions = {
+          ...noTypescriptOptions,
+          styleType: 'css' as const,
+        };
 
         it('generates a format script that formats ts, js, cjs, json, and css', () => {
           const _package = generatePackage(defaultName, defaultOptions, cssOptions);
 
-          expect(_package.scripts.format).toBe('prettier --write "./**/*.(js|cjs|json|yml|css)"');
+          expect(_package.scripts.format).toBe('prettier --write "./**/*.(js|cjs|mjs|json|yml|css)"');
         });
 
         describe('and git initialization', () => {
@@ -197,7 +206,7 @@ describe('generatePackageJSON', () => {
             const _package = generatePackage(defaultName, { ...defaultOptions, git: true }, cssOptions);
 
             expect(_package['lint-staged']).toEqual({
-              '*.(js|cjs)': 'eslint --fix',
+              '*.(js|cjs|mjs)': 'eslint --fix',
               '*.(json|yml|css)': 'prettier --write',
             });
           });
@@ -205,12 +214,15 @@ describe('generatePackageJSON', () => {
       });
 
       describe('and less selected as CSS preprocessor', () => {
-        const lessOptions = { ...noTypescriptOptions, styleType: 'less' as const };
+        const lessOptions = {
+          ...noTypescriptOptions,
+          styleType: 'less' as const,
+        };
 
         it('generates a format script that formats ts, js, cjs, json, and less', () => {
           const _package = generatePackage(defaultName, defaultOptions, lessOptions);
 
-          expect(_package.scripts.format).toBe('prettier --write "./**/*.(js|cjs|json|yml|less)"');
+          expect(_package.scripts.format).toBe('prettier --write "./**/*.(js|cjs|mjs|json|yml|less)"');
         });
 
         describe('and git initialization', () => {
@@ -218,7 +230,7 @@ describe('generatePackageJSON', () => {
             const _package = generatePackage(defaultName, { ...defaultOptions, git: true }, lessOptions);
 
             expect(_package['lint-staged']).toEqual({
-              '*.(js|cjs)': 'eslint --fix',
+              '*.(js|cjs|mjs)': 'eslint --fix',
               '*.(json|yml|less)': 'prettier --write',
             });
           });
@@ -226,12 +238,15 @@ describe('generatePackageJSON', () => {
       });
 
       describe('and sass selected as CSS preprocessor', () => {
-        const sassOptions = { ...noTypescriptOptions, styleType: 'scss' as const };
+        const sassOptions = {
+          ...noTypescriptOptions,
+          styleType: 'scss' as const,
+        };
 
         it('generates a format script that formats ts, js, cjs, json, and scss', () => {
           const _package = generatePackage(defaultName, defaultOptions, sassOptions);
 
-          expect(_package.scripts.format).toBe('prettier --write "./**/*.(js|cjs|json|yml|scss)"');
+          expect(_package.scripts.format).toBe('prettier --write "./**/*.(js|cjs|mjs|json|yml|scss)"');
         });
 
         describe('and git initialization', () => {
@@ -239,7 +254,7 @@ describe('generatePackageJSON', () => {
             const _package = generatePackage(defaultName, { ...defaultOptions, git: true }, sassOptions);
 
             expect(_package['lint-staged']).toEqual({
-              '*.(js|cjs)': 'eslint --fix',
+              '*.(js|cjs|mjs)': 'eslint --fix',
               '*.(json|yml|scss)': 'prettier --write',
             });
           });
diff --git a/tsconfig.eslint.json b/tsconfig.eslint.json
index 03bb07d3..0ed4f09f 100644
--- a/tsconfig.eslint.json
+++ b/tsconfig.eslint.json
@@ -1,4 +1,4 @@
 {
   "extends": "./tsconfig.json",
-  "include": ["index.ts", "src", "test", "*.js", ".*.js", "*.cjs", ".*.cjs"]
+  "include": ["index.ts", "src", "test", "*.js", ".*.js", "*.cjs", ".*.cjs", "*.mjs", ".*.mjs"]
 }