diff --git a/Bootstrapping/CronjobSetup.php b/Bootstrapping/CronjobSetup.php
index 874a7f46..18b878db 100644
--- a/Bootstrapping/CronjobSetup.php
+++ b/Bootstrapping/CronjobSetup.php
@@ -14,7 +14,7 @@ class CronjobSetup extends Bootstrapper
     public function install()
     {
         $id = Shopware()->Db()->fetchOne('SELECT id from s_crontab WHERE `action` = ?', [self::UPDATE_TRANSACTIONS_ACTION]);
-        if(empty($id)) {
+        if ($id === false) {
             $this->bootstrap->createCronJob('RatePAY Transaction Updater', self::UPDATE_TRANSACTIONS_ACTION, self::UPDATE_TRANSACTIONS_INTERVAL_SECONDS);
         }
     }
diff --git a/README.md b/README.md
index 35c4a433..519e1877 100755
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 |------|----------
 |Author | Annegret Seufert
 |Shop Version | `5.0.x` `5.1.x` `5.2.x` `5.3.x`
-|Version | `5.2.1` 
+|Version | `5.2.2` 
 |Link | http://www.ratepay.com
 |Mail | integration@ratepay.com
 |Installation | see below
@@ -24,6 +24,9 @@
 
 ## Changelog
 
+### Version 5.2.2 - Released 2018-08-17
+* hotfix cronjob install in older shopware versions fails if entry already exists
+
 ### Version 5.2.1 - Released 2018-08-16
 * hotfix cronjob class not found error
 
diff --git a/plugin.json b/plugin.json
index 4aade0b8..d4dc3203 100644
--- a/plugin.json
+++ b/plugin.json
@@ -11,7 +11,7 @@
     "supplier": "RatePAY GmbH",
     "description": "<h2>RatePAY Payment plugin for Shopware Community Edition Version 5</h2><ul><li style='list-style: inherit;'>RatePAY Payment Module</li><li style='list-style: inherit;'>Payment means: Invoice, Direct Debit (ELV), Rate</li><li style='list-style: inherit;'>Cancellations, Returns, etc. can be created from an additional tab in the order detail view</li><li style='list-style: inherit;'>Integrated support for multishops</li><li style='list-style: inherit;'>Improved payment form with visual feedback for your customers</li><li style='list-style: inherit;'>Supported Languages: German, English</li><li style='list-style: inherit;'>Backend Log with custom View accessible from your shop backend</li></ul>",
 
-    "currentVersion": "5.2.1",
+    "currentVersion": "5.2.2",
     "payment_confirm": true,
 
     "compatibility": {