diff --git a/code_quality.js b/code_quality.js
index 7f9f4fd990..2acf5a919a 100644
--- a/code_quality.js
+++ b/code_quality.js
@@ -1,5 +1,5 @@
 const gitChangedFiles = require('git-changed-files');
-const prettier = require('@prettier/sync');
+const prettier = require('prettier');
 const prettierConfig = require('./prettier_config.json');
 const codeQualityConfig = require('./package.json').codeQuality || {};
 const path = require('path');
@@ -107,15 +107,17 @@ const groupFilesByExtension = (files) => {
  * @param file: absolute class path
  * @param config: configuration that will be used to prettier the file.
  */
-const prettifyFile = (file, config) => {
+const prettifyFile = async (file, config) => {
   try {
     const text = fs.readFileSync(file).toString();
-    if (prettier.check(text, config) || config?.excludedFiles?.includes(file)) {
+    const check = await prettier.check(text, config);
+    if (check || config?.excludedFiles?.includes(file)) {
       return;
     }
 
     console.log('Running prettier on the file: ' + file);
-    fs.writeFileSync(file, prettier.format(text, config));
+    const format = await prettier.format(text, config);
+    fs.writeFileSync(file, format);
     return true;
   } catch (error) {
     console.log('Error in running prettier the file ' + file + ': \n' + error);
@@ -140,8 +142,9 @@ const prettifyFiles = (filesByExtension) => {
       );
       return;
     }
-    files.forEach((file) => {
-      if (prettifyFile(file, config)) {
+    files.forEach(async (file) => {
+      const action = await prettifyFile(file, config);
+      if (action) {
         filesChanged++;
       }
     });
diff --git a/container/src/LuigiCompoundContainer.svelte b/container/src/LuigiCompoundContainer.svelte
index 9a6fe53660..4b8ebc7950 100644
--- a/container/src/LuigiCompoundContainer.svelte
+++ b/container/src/LuigiCompoundContainer.svelte
@@ -1,6 +1,6 @@
 <svelte:options
   customElement={{
-    tag: null,
+    tag: '',
     shadow: 'none',
     props: {
       activeFeatureToggleList: { type: 'Array', reflect: false, attribute: 'active-feature-toggle-list' },
diff --git a/container/src/LuigiContainer.svelte b/container/src/LuigiContainer.svelte
index 1f848191f4..969229a7d2 100644
--- a/container/src/LuigiContainer.svelte
+++ b/container/src/LuigiContainer.svelte
@@ -1,6 +1,6 @@
 <svelte:options
   customElement={{
-    tag: null,
+    tag: '',
     shadow: 'none',
     props: {
       activeFeatureToggleList: { type: 'Array', reflect: false, attribute: 'active-feature-toggle-list' },
diff --git a/package-lock.json b/package-lock.json
index 39ab04ae70..1562b4b443 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,7 +6,6 @@
       "": {
          "name": "luigi",
          "devDependencies": {
-            "@prettier/sync": "^0.5.2",
             "@stylistic/eslint-plugin": "^2.10.1",
             "@typescript-eslint/eslint-plugin": "^8.13.0",
             "@typescript-eslint/parser": "^8.13.0",
@@ -442,22 +441,6 @@
          "dev": true,
          "license": "MIT"
       },
-      "node_modules/@prettier/sync": {
-         "version": "0.5.2",
-         "resolved": "https://registry.npmjs.org/@prettier/sync/-/sync-0.5.2.tgz",
-         "integrity": "sha512-Yb569su456XNx5BsH/Vyem7xD6g/y9iLmLUzRKM1a/dhU/D7HqqvkAG72znulXlMXztbV0iiu9O5AL8K98TzZQ==",
-         "dev": true,
-         "license": "MIT",
-         "dependencies": {
-            "make-synchronized": "^0.2.8"
-         },
-         "funding": {
-            "url": "https://github.com/prettier/prettier-synchronized?sponsor=1"
-         },
-         "peerDependencies": {
-            "prettier": "*"
-         }
-      },
       "node_modules/@rtsao/scc": {
          "version": "1.1.0",
          "resolved": "https://registry.npmjs.org/@rtsao/scc/-/scc-1.1.0.tgz",
@@ -3852,16 +3835,6 @@
             "node": ">= 10"
          }
       },
-      "node_modules/make-synchronized": {
-         "version": "0.2.9",
-         "resolved": "https://registry.npmjs.org/make-synchronized/-/make-synchronized-0.2.9.tgz",
-         "integrity": "sha512-4wczOs8SLuEdpEvp3vGo83wh8rjJ78UsIk7DIX5fxdfmfMJGog4bQzxfvOwq7Q3yCHLC4jp1urPHIxRS/A93gA==",
-         "dev": true,
-         "license": "MIT",
-         "funding": {
-            "url": "https://github.com/fisker/make-synchronized?sponsor=1"
-         }
-      },
       "node_modules/matcher": {
          "version": "1.1.1",
          "resolved": "https://registry.npmjs.org/matcher/-/matcher-1.1.1.tgz",
diff --git a/package.json b/package.json
index b191e4e18a..d23af499a6 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,6 @@
       "full-code-quality-eslint-e2e-tests": "node code_quality.js -- mode=full_eslint sourcePaths=test/e2e-test-application/cypress/e2e/tests report=e2e-test_full_eslint_report.html"
    },
    "devDependencies": {
-      "@prettier/sync": "^0.5.2",
       "@stylistic/eslint-plugin": "^2.10.1",
       "@typescript-eslint/eslint-plugin": "^8.13.0",
       "@typescript-eslint/parser": "^8.13.0",