diff --git a/bootstrap.info.yml b/bootstrap.info.yml
index ba0c9d3..cfc630b 100644
--- a/bootstrap.info.yml
+++ b/bootstrap.info.yml
@@ -1,6 +1,7 @@
 type: theme
 base theme: false
 core_version_requirement: ^9.3 || ^10
+php: 8.1
 
 name: 'Bootstrap'
 description: 'Built to use Bootstrap, a sleek, intuitive, and powerful front-end framework for faster and easier web development.'
diff --git a/composer.json b/composer.json
index e7f08a2..2fee311 100644
--- a/composer.json
+++ b/composer.json
@@ -33,6 +33,6 @@
     "source": "https://git.drupalcode.org/project/bootstrap"
   },
   "require": {
-    "drupal/core": "^9.3 || ^10"
+    "php": ">=8.1.0"
   }
 }
diff --git a/src/Bootstrap.php b/src/Bootstrap.php
index 7697735..6fdbdcc 100644
--- a/src/Bootstrap.php
+++ b/src/Bootstrap.php
@@ -1357,6 +1357,7 @@ class Bootstrap {
       static::$messenger->addMessage($message, $type, $repeat);
     }
     else {
+      // @noRector
       drupal_set_message($message, $type, $repeat);
     }
   }
diff --git a/src/Plugin/Alter/ThemeRegistry.php b/src/Plugin/Alter/ThemeRegistry.php
index 9961519..fa85bc4 100644
--- a/src/Plugin/Alter/ThemeRegistry.php
+++ b/src/Plugin/Alter/ThemeRegistry.php
@@ -48,7 +48,9 @@ class ThemeRegistry extends Registry implements AlterInterface {
       \Drupal::service('module_handler'),
       \Drupal::service('theme_handler'),
       \Drupal::service('theme.initialization'),
-      $this->currentTheme->getName()
+      \Drupal::service('cache.bootstrap'),
+      \Drupal::service('extension.list.module'),
+      $this->currentTheme->getName(),
     );
     $this->setThemeManager(\Drupal::service('theme.manager'));
     $this->init();
diff --git a/src/Plugin/Provider/ProviderBase.php b/src/Plugin/Provider/ProviderBase.php
index 8c94254..e9af02f 100644
--- a/src/Plugin/Provider/ProviderBase.php
+++ b/src/Plugin/Provider/ProviderBase.php
@@ -649,6 +649,7 @@ class ProviderBase extends PluginBase implements ProviderInterface {
         $fileSystem->prepareDirectory($provider_path, $options);
       }
       else {
+        // @noRector
         file_prepare_directory($provider_path, $options);
       }
 
diff --git a/src/SerializedResponse.php b/src/SerializedResponse.php
index 2464a9c..ab998d0 100644
--- a/src/SerializedResponse.php
+++ b/src/SerializedResponse.php
@@ -160,7 +160,7 @@ class SerializedResponse extends Response {
   /**
    * {@inheritdoc}
    */
-  public function getContent() {
+  public function getContent(): string|false {
     if (!isset($this->content) && ($serializer = $this->getSerializer()) && ($data = $this->getData())) {
       return $serializer->encode($data);
     }