diff --git a/Configuration/TCA/Overrides/sys_template.php b/Configuration/TCA/Overrides/sys_template.php
index 13d32ae..301bb7e 100644
--- a/Configuration/TCA/Overrides/sys_template.php
+++ b/Configuration/TCA/Overrides/sys_template.php
@@ -1,6 +1,6 @@
 <?php
 
-defined('TYPO3_MODE') || die('Access denied.');
+defined('TYPO3') || die('Access denied.');
 
 \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile('tea', 'Configuration/TypoScript', 'Tea');
 \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile(
diff --git a/Configuration/TCA/Overrides/tt_content.php b/Configuration/TCA/Overrides/tt_content.php
index 76006c3..21aeb20 100644
--- a/Configuration/TCA/Overrides/tt_content.php
+++ b/Configuration/TCA/Overrides/tt_content.php
@@ -1,6 +1,6 @@
 <?php
 
-defined('TYPO3_MODE') || die();
+defined('TYPO3') || die();
 
 // This makes the plugin selectable in the BE.
 \TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerPlugin(
diff --git a/composer.json b/composer.json
index 81383eb..3788f3d 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
 	},
 	"require": {
 		"php": "~7.2.0 || ~7.3.0 || ~7.4.0 || ~8.0.0 || ~8.1.0",
-		"typo3/cms-core": "^10.4 || ^11.5.2",
+		"typo3/cms-core": "^10.4.11 || ^11.5.2",
 		"typo3/cms-extbase": "^10.4.6 || ^11.5.2",
 		"typo3/cms-fluid": "^10.4 || ^11.5.2",
 		"typo3/cms-frontend": "^10.4 || ^11.5.2"
diff --git a/ext_localconf.php b/ext_localconf.php
index 5386d5f..ff7f2d9 100644
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -1,6 +1,6 @@
 <?php
 
-defined('TYPO3_MODE') or die('Access denied.');
+defined('TYPO3') or die('Access denied.');
 
 (static function (): void {
     // This makes the plugin available for front-end rendering.