diff --git a/Classes/Controller/VarnishController.php b/Classes/Controller/VarnishController.php
index aa7355e..72b5aa0 100644
--- a/Classes/Controller/VarnishController.php
+++ b/Classes/Controller/VarnishController.php
@@ -21,7 +21,9 @@ public static function ban($cacheObject) {
 					'Varnish-Ban-TYPO3-Pid: ' . (integer) $cacheObject,
 					$siteName
 				));
-			} elseif ($cacheObject === 'pages' || $cacheObject === 'all' || $cacheObject === 'system') {
+			} elseif ($cacheObject === 'pages' || $cacheObject === 'all') {
+				// do nothing
+			} elseif ($cacheObject === 'banAll') {
 				return HttpUtility::ban($url, array(
 					'Varnish-Ban-All: 1',
 					$siteName
diff --git a/Classes/Hooks/Ajax.php b/Classes/Hooks/Ajax.php
index fbf6791..ca3c8a1 100644
--- a/Classes/Hooks/Ajax.php
+++ b/Classes/Hooks/Ajax.php
@@ -3,10 +3,9 @@
 use Z7\Varnish\Controller\VarnishController;
 
 class Ajax {
-
 	public function banAll() {
 		$logger = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\CMS\Core\Log\LogManager')->getLogger(__CLASS__);
 		$logger->info('User ' . $GLOBALS['BE_USER']->user['username'] . ' has cleared the varnish cache');
-		VarnishController::ban('all');
+		VarnishController::ban('banAll');
 	}
 }
\ No newline at end of file
diff --git a/Classes/Hooks/ClearCacheMenu.php b/Classes/Hooks/ClearCacheMenu.php
index 5b1c1a3..0679adc 100644
--- a/Classes/Hooks/ClearCacheMenu.php
+++ b/Classes/Hooks/ClearCacheMenu.php
@@ -1,6 +1,7 @@
 <?php
 namespace Z7\Varnish\Hooks;
 use TYPO3\CMS\Extbase\Utility\LocalizationUtility;
+use TYPO3\CMS\Backend\Utility\BackendUtility;
 
 class ClearCacheMenu implements \TYPO3\CMS\Backend\Toolbar\ClearCacheActionsHookInterface {
 
@@ -12,11 +13,14 @@ class ClearCacheMenu implements \TYPO3\CMS\Backend\Toolbar\ClearCacheActionsHook
 	 * @return void
 	 */
 	public function manipulateCacheActions(&$cacheActions, &$optionValues) {
-		$cacheActions[] = array(
-			'id' => 'varnish',
-			'title' => LocalizationUtility::translate('LLL:EXT:varnish/Resources/Private/Language/locallang.xlf:hooks.cache.title', $_EXTKEY),
-			'href' => 'ajax.php?ajaxID=varnish::banAll',
-			'icon' => '<img src="/' . $GLOBALS['TYPO3_LOADED_EXT']['varnish']['siteRelPath'] . 'Resources/Public/Icons/ClearVarnish.svg" width="16" height="16" />'
-		);
+        if ($GLOBALS['BE_USER']->isAdmin()) {
+			$cacheActions[] = array(
+				'id' => 'varnish',
+				'title' => LocalizationUtility::translate('LLL:EXT:varnish/Resources/Private/Language/locallang.xlf:hooks.cache.title', $_EXTKEY),
+				'href' => BackendUtility::getAjaxUrl('varnish::banAll'),
+				'icon' => '<img src="/' . $GLOBALS['TYPO3_LOADED_EXT']['varnish']['siteRelPath'] . 'Resources/Public/Icons/ClearVarnish.svg" width="16" height="16" />'
+			);
+            $optionValues[] = 'banAll';
+		}
 	}
 }
\ No newline at end of file
diff --git a/Classes/Utility/HttpUtility.php b/Classes/Utility/HttpUtility.php
index 17d2eab..ad847a0 100755
--- a/Classes/Utility/HttpUtility.php
+++ b/Classes/Utility/HttpUtility.php
@@ -21,7 +21,7 @@ public static function ban($url, $headers = array()) {
 	 * @param array $headers
 	 * @return array
 	 */
-	private function sendRequest($url, $verb, $headers) {
+	private static function sendRequest($url, $verb, $headers) {
 		$ch = curl_init();
 		curl_setopt($ch, CURLOPT_URL, $url);
 		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $verb);
diff --git a/README.md b/README.md
index 77cdf2d..04e3d74 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Install the extension.
 ## Thanks…
 
 * …to snowflake for their [varnish-typo3](https://github.com/snowflakech/typo3-varnish) extension.
-  Most of this extension is modeled after theirs, but simplified a bit and it also works on 7.2.
+  Most of this extension is modeled after theirs, but simplified a bit and it also works on 7 LTS.
 
 * …to varnish-software for openly sharing the superbunny graphics.
 
diff --git a/ext_emconf.php b/ext_emconf.php
index 45061ee..ce334cb 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -8,7 +8,7 @@
 	'constraints' => array(
 		'depends' => array(
 			'php' => '5.3.0-0.0.0',
-			'typo3' => '7.2.0-7.2.99',
+			'typo3' => '7.2.0-7.6.99',
 		),
 		'conflicts' => array(
 		),
diff --git a/ext_localconf.php b/ext_localconf.php
index 64eb32b..5a64980 100644
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -4,17 +4,17 @@
 }
 
 if (TYPO3_MODE === 'BE') {
-	$TYPO3_CONF_VARS['SC_OPTIONS']['additionalBackendItems']['cacheActions'][] =
-	   	'EXT:' . $_EXTKEY . '/Classes/Hooks/ClearCacheMenu.php:Z7\\Varnish\\Hooks\\ClearCacheMenu';
+	$TYPO3_CONF_VARS['SC_OPTIONS']['additionalBackendItems']['cacheActions']['banAll'] =
+		'Z7\\Varnish\\Hooks\\ClearCacheMenu';
 	$TYPO3_CONF_VARS['SC_OPTIONS']['t3lib/class.t3lib_tcemain.php']['clearCachePostProc'][] =
-	   	'EXT:' . $_EXTKEY . '/Classes/Hooks/ClearCache.php:Z7\\Varnish\\Hooks\\ClearCache->clearCache';
-	$TYPO3_CONF_VARS['BE']['AJAX']['varnish::banAll'] = array(
-		'callbackMethod' => 'EXT:' . $_EXTKEY . '/Classes/Hooks/Ajax.php:Z7\\Varnish\\Hooks\Ajax->banAll',
-		'csrfTokenCheck' => FALSE
-	);
+		'Z7\\Varnish\\Hooks\\ClearCache->clearCache';
+    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::registerAjaxHandler(
+        'varnish::banAll',
+		'Z7\\Varnish\\Hooks\\Ajax->banAll'
+    );
 }
 
 if (TYPO3_MODE === 'FE') {
 	$TYPO3_CONF_VARS['SC_OPTIONS']['tslib/class.tslib_fe.php']['contentPostProc-output'][] =
-	   	'EXT:' . $_EXTKEY . '/Classes/Hooks/Frontend.php:Z7\\Varnish\\Hooks\\Frontend->sendHeader';
+		'Z7\\Varnish\\Hooks\\Frontend->sendHeader';
 }
\ No newline at end of file