diff --git a/Block/Adminhtml/System/Config/Form/Field/ColorPicker.php b/Block/Adminhtml/System/Config/Form/Field/ColorPicker.php
index d5954bb..2fed115 100644
--- a/Block/Adminhtml/System/Config/Form/Field/ColorPicker.php
+++ b/Block/Adminhtml/System/Config/Form/Field/ColorPicker.php
@@ -5,7 +5,7 @@
  * @category   Admin
  * @package    Del001_AdminUiColorSwap
  * @author     https://github.com/nmarcy-del
- * @copyright  Copyright (c) 2023 https://github.com/nmarcy-del
+ * @copyright  Copyright (c) 2024 https://github.com/nmarcy-del
  */
 
 namespace Del001\AdminUiColorSwap\Block\Adminhtml\System\Config\Form\Field;
diff --git a/Block/Adminhtml/Theme.php b/Block/Adminhtml/Theme.php
index 3a8d9b4..9a6b8b2 100644
--- a/Block/Adminhtml/Theme.php
+++ b/Block/Adminhtml/Theme.php
@@ -5,7 +5,7 @@
  * @category   Admin
  * @package    Del001_AdminUiColorSwap
  * @author     https://github.com/nmarcy-del
- * @copyright  Copyright (c) 2023 https://github.com/nmarcy-del
+ * @copyright  Copyright (c) 2024 https://github.com/nmarcy-del
  */
 
 namespace Del001\AdminUiColorSwap\Block\Adminhtml;
diff --git a/Helper/Data.php b/Helper/Data.php
index fc1a321..e01de4a 100644
--- a/Helper/Data.php
+++ b/Helper/Data.php
@@ -5,7 +5,7 @@
  * @category   Admin
  * @package    Del001_AdminUiColorSwap
  * @author     https://github.com/nmarcy-del
- * @copyright  Copyright (c) 2023 https://github.com/nmarcy-del
+ * @copyright  Copyright (c) 2024 https://github.com/nmarcy-del
  */
 
 namespace Del001\AdminUiColorSwap\Helper;
diff --git a/Model/Config/Source/Theme.php b/Model/Config/Source/Theme.php
index fa8e59a..529d814 100644
--- a/Model/Config/Source/Theme.php
+++ b/Model/Config/Source/Theme.php
@@ -5,7 +5,7 @@
  * @category   Admin
  * @package    Del001_AdminUiColorSwap
  * @author     https://github.com/nmarcy-del
- * @copyright  Copyright (c) 2023 https://github.com/nmarcy-del
+ * @copyright  Copyright (c) 2024 https://github.com/nmarcy-del
  */
 
 namespace Del001\AdminUiColorSwap\Model\Config\Source;
diff --git a/Test/Unit/Block/Adminhtml/ThemeTest.php b/Test/Unit/Block/Adminhtml/ThemeTest.php
index 62bc078..ac6fd72 100644
--- a/Test/Unit/Block/Adminhtml/ThemeTest.php
+++ b/Test/Unit/Block/Adminhtml/ThemeTest.php
@@ -62,4 +62,9 @@ public function testGetCustomFontSecondaryColor(): void
     {
         $this->assertNull($this->theme->getCustomFontSecondaryColor());
     }
+
+    public function testIsCssMinified(): void
+    {
+        $this->assertNull($this->theme->isCssMinified());
+    }
 }
diff --git a/composer.json b/composer.json
index 592ea02..972ac5d 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "del001/admin-ui-color-swap",
     "description": "A Magento 2 module to swap the admin UI colors",
     "type": "magento2-module",
-    "version": "1.0.4",
+    "version": "1.0.5",
     "license": [
         "proprietary"
     ],
diff --git a/etc/adminhtml/system.xml b/etc/adminhtml/system.xml
index 2ad43b6..9998145 100644
--- a/etc/adminhtml/system.xml
+++ b/etc/adminhtml/system.xml
@@ -6,7 +6,7 @@
  * @category   Admin
  * @package    Del001_AdminUiColorSwap
  * @author     https://github.com/nmarcy-del
- * @copyright  Copyright (c) 2023 https://github.com/nmarcy-del
+ * @copyright  Copyright (c) 2024 https://github.com/nmarcy-del
  */
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
diff --git a/etc/config.xml b/etc/config.xml
index b0d8c59..17c42f1 100644
--- a/etc/config.xml
+++ b/etc/config.xml
@@ -6,7 +6,7 @@
  * @category   Admin
  * @package    Del001_AdminUiColorSwap
  * @author     https://github.com/nmarcy-del
- * @copyright  Copyright (c) 2023 https://github.com/nmarcy-del
+ * @copyright  Copyright (c) 2024 https://github.com/nmarcy-del
  */
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">
diff --git a/etc/module.xml b/etc/module.xml
index b89bf83..4f1d844 100644
--- a/etc/module.xml
+++ b/etc/module.xml
@@ -6,7 +6,7 @@
  * @category   Admin
  * @package    Del001_AdminUiColorSwap
  * @author     https://github.com/nmarcy-del
- * @copyright  Copyright (c) 2023 https://github.com/nmarcy-del
+ * @copyright  Copyright (c) 2024 https://github.com/nmarcy-del
  */
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
diff --git a/registration.php b/registration.php
index 1eb7ef5..1a0e664 100644
--- a/registration.php
+++ b/registration.php
@@ -6,7 +6,7 @@
  * @category   Admin
  * @package    Del001_AdminUiColorSwap
  * @author     https://github.com/nmarcy-del
- * @copyright  Copyright (c) 2023 https://github.com/nmarcy-del
+ * @copyright  Copyright (c) 2024 https://github.com/nmarcy-del
  */
 
 \Magento\Framework\Component\ComponentRegistrar::register(
diff --git a/view/adminhtml/templates/theme.phtml b/view/adminhtml/templates/theme.phtml
index db4d942..131fe1e 100644
--- a/view/adminhtml/templates/theme.phtml
+++ b/view/adminhtml/templates/theme.phtml
@@ -28,6 +28,14 @@ $fontMain = $escaper->escapeHtml($block->getCustomFontMainColor());
 $fontSecondary = $escaper->escapeHtml($block->getCustomFontSecondaryColor());
 ?>
 <script>
+    const loadCss = (url) => {
+        let linkElement = document.createElement('link')
+        linkElement.rel = 'stylesheet';
+        linkElement.type = 'text/css';
+        linkElement.href =  url;
+        document.getElementsByTagName('head')[0].appendChild(linkElement);
+    }
+
     // check if module is enabled
     if ('<?= $escaper->escapeHtml($isEnabled) ?>' === '1') {
         // Get default filename according to environment or get forced one
@@ -38,22 +46,34 @@ $fontSecondary = $escaper->escapeHtml($block->getCustomFontSecondaryColor());
                 cssFilename = '<?= $escaper->escapeHtml($selectedTheme) ?>'
             }
         }
+
         if ('<?= $escaper->escapeHtml($block->isUsedCustomTheme())?>' === '1') {
             cssFilename = 'custom_admin'
         }
+
         if (cssFilename) {
             // load css stylesheet according to environment
-            let linkElement = document.createElement('link')
-            linkElement.rel = 'stylesheet';
-            linkElement.type = 'text/css';
-            linkElement.href = '<?= $escaper->escapeHtml($cssPath) ?>' + '/' + cssFilename + '.css'
-            document.getElementsByTagName('head')[0].appendChild(linkElement);
+            let generalUrl = '<?= $escaper->escapeHtml($cssPath) ?>' + '/' + cssFilename;
+
+            let cssUrl = generalUrl + '.css';
+            let cssMinifiedUrl = generalUrl + '.min.css';
+
+            fetch(cssUrl, { method: 'HEAD' }).then(function(response) {
+                if (response.ok) {
+                    loadCss(cssUrl);
+                } else {
+                    loadCss(cssMinifiedUrl);
+                }
+            }).catch(function(error) {
+                loadCss(cssMinifiedUrl);
+            });
         }
+
         if (cssFilename === 'custom_admin') {
-           // get the root element
-           let root = document.querySelector(':root');
+            // get the root element
+            let root = document.querySelector(':root');
 
-           let themeMain = '<?= $escaper->escapeHtml($mainColor) ?>'
+            let themeMain = '<?= $escaper->escapeHtml($mainColor) ?>'
             if (themeMain) {
                 root.style.setProperty('--primarycolor', themeMain);
             }