diff --git a/Classes/Configuration/ExtensionConfigurationManager.php b/Classes/Configuration/ExtensionConfigurationManager.php
index 9ed2963..f363d6d 100644
--- a/Classes/Configuration/ExtensionConfigurationManager.php
+++ b/Classes/Configuration/ExtensionConfigurationManager.php
@@ -149,7 +149,7 @@ public function configureForSite(Site $site, int $languageId = 0): void
         if ($language !== null) {
             $languageConfiguration = $language->toArray();
 
-            if ($languageConfiguration['qbank_deploymentSites']) {
+            if ($languageConfiguration['qbank_deploymentSites'] ?? false) {
                 $this->deploymentSites = GeneralUtility::intExplode(
                     ',',
                     $languageConfiguration['qbank_deploymentSites'],
@@ -160,7 +160,7 @@ public function configureForSite(Site $site, int $languageId = 0): void
             }
         }
 
-        if ($site->getConfiguration()['qbank_deploymentSites']) {
+        if ($site->getConfiguration()['qbank_deploymentSites'] ?? false) {
             $this->deploymentSites = GeneralUtility::intExplode(
                 ',',
                 $site->getConfiguration()['qbank_deploymentSites'],
diff --git a/Classes/FormEngine/Container/QbankSelectorButtonContainer.php b/Classes/FormEngine/Container/QbankSelectorButtonContainer.php
index b2f666a..9169090 100644
--- a/Classes/FormEngine/Container/QbankSelectorButtonContainer.php
+++ b/Classes/FormEngine/Container/QbankSelectorButtonContainer.php
@@ -5,6 +5,7 @@
 namespace Pixelant\Qbank\FormEngine\Container;
 
 use Pixelant\Qbank\Configuration\ExtensionConfigurationManager;
+use Pixelant\Qbank\Utility\CompatibilityUtility;
 use Pixelant\Qbank\Utility\QbankUtility;
 use TYPO3\CMS\Backend\Form\Container\InlineControlContainer;
 use TYPO3\CMS\Core\Imaging\Icon;
@@ -167,12 +168,16 @@ protected function getExtensionConfigurationManager(): ExtensionConfigurationMan
 
         $languageId = -1;
         if ($languageField) {
-            $languageId = (int)$this->data['databaseRow'][$languageField][0];
+            if (CompatibilityUtility::typo3VersionIsLessThan('11')) {
+                $languageId = (int)$this->data['databaseRow'][$languageField][0];
+            } else {
+                $languageId = (int)$this->data['databaseRow'][$languageField];
+            }
         }
 
-        $pageId = $this->data['defaultLanguageRow']['pid'];
+        $pageId = $this->data['defaultLanguageRow']['pid'] ?? null;
         if ($this->data['tableName'] === 'pages') {
-            $pageId = $this->data['defaultLanguageRow']['uid'];
+            $pageId = $this->data['defaultLanguageRow']['uid'] ?? null;
         }
 
         if ($pageId === null) {
diff --git a/Classes/Repository/MediaUsageRepository.php b/Classes/Repository/MediaUsageRepository.php
index 016dacd..b348d54 100644
--- a/Classes/Repository/MediaUsageRepository.php
+++ b/Classes/Repository/MediaUsageRepository.php
@@ -59,7 +59,7 @@ public function add(MediaUsage $mediaUsage): void
      */
     public function removeOneByQbankAndLocalId(int $qbankId, string $localId): void
     {
-        $usage = $this->findByQbankAndLocalId($qbankId, $localId)[0];
+        $usage = $this->findByQbankAndLocalId($qbankId, $localId)[0] ?? false;
 
         if (!$usage) {
             return;
diff --git a/Classes/Service/QbankService.php b/Classes/Service/QbankService.php
index 1da26da..9bfd8ed 100644
--- a/Classes/Service/QbankService.php
+++ b/Classes/Service/QbankService.php
@@ -262,12 +262,13 @@ public function synchronizeMetadata(int $fileId): void
         /** @var MediaPropertyValue $qbankPropertyValue */
         foreach ($qbankPropertyValues as $qbankPropertyValue) {
             $sourceProperty = $qbankPropertyValue->getProperty()->getKey();
-            $targetProperty = $metaDataMappings[$sourceProperty];
 
-            if (!isset($targetProperty)) {
+            if (!isset($metaDataMappings[$sourceProperty])) {
                 continue;
             }
 
+            $targetProperty = $metaDataMappings[$sourceProperty];
+
             $this->eventDispatcher->dispatch(new FilePropertyChangeEvent(
                 $file,
                 $targetProperty,
diff --git a/Classes/Utility/CompatibilityUtility.php b/Classes/Utility/CompatibilityUtility.php
new file mode 100644
index 0000000..08674a6
--- /dev/null
+++ b/Classes/Utility/CompatibilityUtility.php
@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pixelant\Qbank\Utility;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+use TYPO3\CMS\Core\Utility\VersionNumberUtility;
+
+/**
+ * Miscellaneous functions relating to compatibility with different TYPO3 versions
+ */
+class CompatibilityUtility
+{
+    /**
+     * Returns true if the current TYPO3 version is less than $version
+     *
+     * @param string $version
+     * @return bool
+     */
+    public static function typo3VersionIsLessThan(string $version)
+    {
+        return self::getTypo3VersionInteger() < VersionNumberUtility::convertVersionNumberToInteger($version);
+    }
+
+    /**
+     * Returns true if the current TYPO3 version is less than or equal to $version
+     *
+     * @param string $version
+     * @return bool
+     */
+    public static function typo3VersionIsLessThanOrEqualTo(string $version)
+    {
+        return self::getTypo3VersionInteger() <= VersionNumberUtility::convertVersionNumberToInteger($version);
+    }
+
+    /**
+     * Returns true if the current TYPO3 version is greater than $version
+     *
+     * @param string $version
+     * @return bool
+     */
+    public static function typo3VersionIsGreaterThan(string $version)
+    {
+        return self::getTypo3VersionInteger() > VersionNumberUtility::convertVersionNumberToInteger($version);
+    }
+
+    /**
+     * Returns true if the current TYPO3 version is greater than or equal to $version
+     *
+     * @param string $version
+     * @return bool
+     */
+    public static function typo3VersionIsGreaterThanOrEqualTo(string $version)
+    {
+        return self::getTypo3VersionInteger() >= VersionNumberUtility::convertVersionNumberToInteger($version);
+    }
+
+    /**
+     * Returns the TYPO3 version as an integer
+     *
+     * @return int
+     */
+    public static function getTypo3VersionInteger()
+    {
+        return VersionNumberUtility::convertVersionNumberToInteger(VersionNumberUtility::getNumericTypo3Version());
+    }
+}
diff --git a/Classes/Utility/QbankUtility.php b/Classes/Utility/QbankUtility.php
index a83483c..c9a0566 100644
--- a/Classes/Utility/QbankUtility.php
+++ b/Classes/Utility/QbankUtility.php
@@ -104,7 +104,12 @@ public static function getApi(): QBankApi
      */
     public static function getAccessToken(): string
     {
-        return self::getApi()->getTokens()['accessToken']->getToken();
+        // qbnk/qbank3api-phpwrapper ^4.9 returns an object. In later versions the value is a string.
+        if (is_object(self::getApi()->getTokens()['accessToken'])) {
+            return self::getApi()->getTokens()['accessToken']->getToken();
+        }
+
+        return self::getApi()->getTokens()['accessToken'];
     }
 
     /**
diff --git a/composer.json b/composer.json
index a62dfb9..8fda134 100644
--- a/composer.json
+++ b/composer.json
@@ -19,9 +19,9 @@
 		}
 	],
 	"require": {
-		"php": "^7.2",
-		"qbnk/qbank3api-phpwrapper": "^3.4",
-		"typo3/cms-core": "^10.4"
+		"php": "~7.2.0 || ~7.3.0 || ~7.4.0 || ~8.0",
+		"qbnk/qbank3api-phpwrapper": "^4.9 || ^5.1",
+		"typo3/cms-core": "^10.4 || ^11.5.2"
 	},
 	"replace": {
 		"typo3-ter/qbank": "self.version"
@@ -30,9 +30,9 @@
 		"codeception/codeception": "^4.1.5",
 		"helhum/typo3-composer-setup": "^0.5.7",
 		"nimut/testing-framework": "^5.0.3",
-		"phpunit/phpunit": "^7.5.20",
-		"seld/jsonlint": "^1.8",
-		"typo3/cms-fluid-styled-content": "^9.5 || ^10.4"
+		"phpunit/phpunit": "^8.5.28",
+		"seld/jsonlint": "^1.9",
+		"typo3/cms-fluid-styled-content": "^10.4 || ^11.5.2"
 	},
 	"suggest": {
 		"typo3/cms-filemetadata": "For additional meta data fields."
diff --git a/ext_emconf.php b/ext_emconf.php
index 2d1c2cf..349f158 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -10,7 +10,7 @@
     'state' => 'stable',
     'createDirs' => '',
     'clearCacheOnLoad' => true,
-    'version' => '1.1.1',
+    'version' => '1.2.0',
     'constraints' => [
         'depends' => [
             'typo3' => '10.4.0-10.4.99',