diff --git a/mailpoet/lib/Config/Env.php b/mailpoet/lib/Config/Env.php
index 15b8bb5585..b31b5920dc 100644
--- a/mailpoet/lib/Config/Env.php
+++ b/mailpoet/lib/Config/Env.php
@@ -74,7 +74,7 @@ class Env {
     if ($parsedHost === false) {
       throw new \InvalidArgumentException('Invalid db host configuration.');
     }
-    list($host, $port, $socket, $isIpv6) = $parsedHost;
+    [$host, $port, $socket, $isIpv6] = $parsedHost;
 
     global $wpdb;
     self::$dbPrefix = $wpdb->prefix . self::$pluginPrefix;
@@ -93,6 +93,7 @@ class Env {
 
   public static function getDbTimezoneOffset($offset = false) {
     $offset = ($offset) ? $offset : WPFunctions::get()->getOption('gmt_offset');
+    $offset = (float)($offset);
     $mins = $offset * 60;
     $sgn = ($mins < 0 ? -1 : 1);
     $mins = abs($mins);
diff --git a/mailpoet/tests/integration/Config/EnvTest.php b/mailpoet/tests/integration/Config/EnvTest.php
index fb789dcf93..e573b4042f 100644
--- a/mailpoet/tests/integration/Config/EnvTest.php
+++ b/mailpoet/tests/integration/Config/EnvTest.php
@@ -86,6 +86,7 @@ class EnvTest extends \MailPoetTest {
     verify(Env::getDbTimezoneOffset('+1.5'))->equals("+01:30");
     verify(Env::getDbTimezoneOffset('+11'))->equals("+11:00");
     verify(Env::getDbTimezoneOffset('-5.5'))->equals("-05:30");
+    verify(Env::getDbTimezoneOffset('xyz'))->equals("+00:00");
   }
 
   public function _after() {