diff --git a/Classes/Hooks/DataHandler.php b/Classes/Hooks/DataHandler.php
index a5743a9..87019a1 100644
--- a/Classes/Hooks/DataHandler.php
+++ b/Classes/Hooks/DataHandler.php
@@ -41,14 +41,14 @@ public function processDatamap_beforeStart(\TYPO3\CMS\Core\DataHandling\DataHand
         }
     }
 
-    public function processCmdmap_preProcess($command, $table, $id, $value, $pObj, $pasteUpdate)
+    public function processCmdmap_preProcess($command, $table, $id, $value, $pObj, $pasteUpdate): void
     {
         if (in_array($command, ['copy', 'localize']) && $table === 'tt_content') {
             $GLOBALS['TCA']['tt_content']['columns']['tx_t23inlinecontainer_elements']['config']['type'] = 'none';
         }
     }
 
-    public function processCmdmap_postProcess($command, $table, $id, $value, $pObj, $pasteUpdate, $pasteDatamap)
+    public function processCmdmap_postProcess($command, $table, $id, $value, $pObj, $pasteUpdate, $pasteDatamap): void
     {
         if (in_array($command, ['copy', 'localize']) && $table === 'tt_content') {
             $GLOBALS['TCA']['tt_content']['columns']['tx_t23inlinecontainer_elements']['config']['type'] = 'tx_t23inlinecontainer_elements';
@@ -60,7 +60,7 @@ public function processCmdmap_postProcess($command, $table, $id, $value, $pObj,
      * @param \TYPO3\CMS\Core\DataHandling\DataHandler $dataHandler
      * @return void
      */
-    public function processDatamap_afterAllOperations(\TYPO3\CMS\Core\DataHandling\DataHandler $dataHandler)
+    public function processDatamap_afterAllOperations(\TYPO3\CMS\Core\DataHandling\DataHandler $dataHandler): void
     {
         // Make sure that container sorting is only update once per container element
         // => Only run sorting update after all operations have been finished
diff --git a/Classes/Integrity/Sorting.php b/Classes/Integrity/Sorting.php
index 81dd37d..834a6d6 100644
--- a/Classes/Integrity/Sorting.php
+++ b/Classes/Integrity/Sorting.php
@@ -10,7 +10,7 @@
 
 class Sorting extends \B13\Container\Integrity\Sorting
 {
-    public function runForSingleContainer($containerRecord, $cType)
+    public function runForSingleContainer($containerRecord, $cType): void
     {
         $columns = $this->tcaRegistry->getAvailableColumns($cType);
         $colPosByCType[$cType] = [];
diff --git a/Classes/Listener/AddFieldToAllContainers.php b/Classes/Listener/AddFieldToAllContainers.php
index 9cae455..df57948 100644
--- a/Classes/Listener/AddFieldToAllContainers.php
+++ b/Classes/Listener/AddFieldToAllContainers.php
@@ -16,7 +16,7 @@
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 class AddFieldToAllContainers {
-    public function __invoke(AfterTcaCompilationEvent $event)
+    public function __invoke(AfterTcaCompilationEvent $event): void
     {
         $containerRegistry = GeneralUtility::makeInstance(\B13\Container\Tca\Registry::class);
 
diff --git a/Classes/Listener/ContentUsedOnPage.php b/Classes/Listener/ContentUsedOnPage.php
new file mode 100644
index 0000000..91715cb
--- /dev/null
+++ b/Classes/Listener/ContentUsedOnPage.php
@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Team23\T23InlineContainer\Listener;
+
+use B13\Container\Domain\Factory\Exception;
+use B13\Container\Domain\Factory\PageView\Backend\ContainerFactory;
+use B13\Container\Tca\Registry;
+use TYPO3\CMS\Backend\View\Event\IsContentUsedOnPageLayoutEvent;
+
+final class ContentUsedOnPage
+{
+    protected Registry $tcaRegistry;
+    protected ContainerFactory $containerFactory;
+
+    public function __construct(ContainerFactory $containerFactory, Registry $tcaRegistry)
+    {
+        $this->containerFactory = $containerFactory;
+        $this->tcaRegistry = $tcaRegistry;
+    }
+
+    public function __invoke(IsContentUsedOnPageLayoutEvent $event): void
+    {
+        $record = $event->getRecord();
+        if ($record['tx_container_parent'] > 0) {
+            try {
+                $container = $this->containerFactory->buildContainer((int)$record['tx_container_parent']);
+                $columns = $this->tcaRegistry->getAvailableColumns($container->getCType());
+                foreach ($columns as $column) {
+                    if ($column['colPos'] === (int)$record['colPos']) {
+                        if ($record['sys_language_uid'] > 0 && $container->isConnectedMode()) {
+
+                            /*
+                            Prevents displaying of "Unused elements detected on this page" in the Page module in Backend when
+                            container element is translated in "Connected Mode"
+                            */
+                            $used = ($container->hasChildInColPos((int)$record['colPos'], (int)$record['l18n_parent'])
+                                || $container->hasChildInColPos((int)$record['colPos'], (int)$record['uid']));
+                            $event->setUsed($used);
+                            return;
+                        }
+                        $used = $container->hasChildInColPos((int)$record['colPos'], (int)$record['uid']);
+                        $event->setUsed($used);
+                        return;
+                    }
+                }
+            } catch (Exception $e) {
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Configuration/Services.yaml b/Configuration/Services.yaml
index 1e6f076..a364d62 100644
--- a/Configuration/Services.yaml
+++ b/Configuration/Services.yaml
@@ -15,4 +15,10 @@ services:
     tags:
       - name: event.listener
         identifier: 'addFieldToAllContainers'
-        event: TYPO3\CMS\Core\Configuration\Event\AfterTcaCompilationEvent
\ No newline at end of file
+        event: TYPO3\CMS\Core\Configuration\Event\AfterTcaCompilationEvent
+
+  Team23\T23InlineContainer\Listener\ContentUsedOnPage:
+    tags:
+      - name: event.listener
+        identifier: 't23-inline-container-content-used-on-page'
+        after: 'tx-container-content-used-on-page'
\ No newline at end of file
diff --git a/Configuration/TCA/Overrides/tt_content.php b/Configuration/TCA/Overrides/tt_content.php
index 81534d0..c2d180d 100644
--- a/Configuration/TCA/Overrides/tt_content.php
+++ b/Configuration/TCA/Overrides/tt_content.php
@@ -27,7 +27,6 @@
                         'levelLinksPosition' => 'bottom',
                         'useSortable' => true,
                         'showPossibleLocalizationRecords' => true,
-                        'showRemovedLocalizationRecords' => true,
                         'showAllLocalizationLink' => true,
                         'showSynchronizationLink' => true,
                         'enabledControls' => [
diff --git a/composer.json b/composer.json
index cc478d1..59d23da 100644
--- a/composer.json
+++ b/composer.json
@@ -5,8 +5,8 @@
     "homepage": "https://www.team23.de/",
     "license": "GPL-2.0-or-later",
     "require": {
-        "typo3/cms-core": "^11.5 || ^12.4",
-        "b13/container": "^2.3.1"
+        "typo3/cms-core": "^12.4 || ^13.4",
+        "b13/container": "^2.3 || ^3.1"
     },
     "suggest": {
         "georgringer/news": "Most usefull application of this extension."
diff --git a/ext_emconf.php b/ext_emconf.php
index bf9390d..b40b07f 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -15,17 +15,16 @@
     'author_email' => 'dreier@team23.de',
     'author_company' => 'TEAM23',
     'state' => 'beta',
-    'clearCacheOnLoad' => true,
-    'version' => '0.0.13',
+    'version' => '1.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.0.0-12.9.99',
-            'container' => '2.3.1-2.9.99',
+            'typo3' => '12.4.0-13.4.99',
+            'container' => '2.3.1-3.9.99',
         ],
         'conflicts' => [
         ],
         'suggests' => [
-            'news' => '9.0.0-10.9.9'
+            'news' => '9.0.0-12.9.9'
         ],
     ],
 ];