diff --git a/index.js b/index.js
index 1d721d4..27f230e 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,8 @@
 const Blueprint = require('ember-cli/lib/models/blueprint');
-const fs = require('fs-extra');
+const fs = require('fs');
 const { join } = require('path');
 const emberCliUpdate = require('./lib/ember-cli-update');
+const copyWithTemplate = require('./lib/copy-with-template');
 
 const appBlueprint = Blueprint.lookup('app');
 
@@ -64,7 +65,7 @@ module.exports = {
     );
 
     let packageJson = join(options.target, 'package.json');
-    let json = await fs.readJSON(packageJson);
+    let json = JSON.parse(fs.readFileSync(packageJson));
 
     json.scripts = {
       ...json.scripts,
@@ -73,7 +74,7 @@ module.exports = {
       'test:ember': 'vite build --mode test && ember test --path dist',
     };
 
-    await fs.writeFile(packageJson, JSON.stringify(json, null, 2));
+    fs.writeFileSync(packageJson, JSON.stringify(json, null, 2));
 
     await emberCliUpdate({
       projectDir: options.target,
diff --git a/lib/ember-cli-update.js b/lib/ember-cli-update.js
index 20c9094..091dbc9 100644
--- a/lib/ember-cli-update.js
+++ b/lib/ember-cli-update.js
@@ -1,4 +1,4 @@
-const fs = require('fs-extra');
+const fs = require('fs');
 const { join } = require('path');
 
 module.exports = async function ({
@@ -7,28 +7,29 @@ module.exports = async function ({
   version,
   options = [],
 } = {}) {
-  fs.writeJSON(
+  fs.writeFileSync(
     join(projectDir, 'config', 'ember-cli-update.json'),
-    {
-      schemaVersion: '1.0.0',
-      projectName,
-      packages: [
-        {
-          name: '@embroider/app-blueprint',
-          version,
-          blueprints: [
-            {
-              name: '@embroider/app-blueprint',
-              isBaseBlueprint: true,
-              // TODO pass more of the original options through
-              options: [`--package-manager ${options.packageManager}`],
-            },
-          ],
-        },
-      ],
-    },
-    {
-      spaces: 2,
-    },
+    JSON.stringify(
+      {
+        schemaVersion: '1.0.0',
+        projectName,
+        packages: [
+          {
+            name: '@embroider/app-blueprint',
+            version,
+            blueprints: [
+              {
+                name: '@embroider/app-blueprint',
+                isBaseBlueprint: true,
+                // TODO pass more of the original options through
+                options: [`--package-manager ${options.packageManager}`],
+              },
+            ],
+          },
+        ],
+      },
+      null,
+      { spaces: 2 },
+    ),
   );
 };