diff --git a/c3-cloudfront-clear-cache.php b/c3-cloudfront-clear-cache.php
index 0e885217..9f3f430f 100644
--- a/c3-cloudfront-clear-cache.php
+++ b/c3-cloudfront-clear-cache.php
@@ -1,7 +1,7 @@
 <?php
 /*
  * Plugin Name: C3 Cloudfront Cache Controller
- * Version: 5.4.0
+ * Version: 5.4.1
  * Plugin URI:https://github.com/amimoto-ami/c3-cloudfront-clear-cache
  * Description: Manage CloudFront Cache and provide some fixtures.
  * Author: hideokamoto
diff --git a/module/model/invalidation.php b/module/model/invalidation.php
index e8bcd6cd..045b4072 100644
--- a/module/model/invalidation.php
+++ b/module/model/invalidation.php
@@ -48,7 +48,7 @@ public static function get_instance() {
 	 * @access private
 	 **/
 	private function _register_cron_event( $query ) {
-		if ( $query['Paths']['Items'][0] === '/*') {
+		if (isset( $query['Paths'] ) && isset( $query['Paths']['Items'] ) && $query['Paths']['Items'][0] === '/*') {
 			return;
 		}
 		if (apply_filters( 'c3_disabled_cron_retry', false)) {
diff --git a/readme.txt b/readme.txt
index 6a1d93fb..0270ed70 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1,10 +1,10 @@
 === C3 Cloudfront Cache Controller ===
-Contributors: amimotoami,hideokamoto,megumithemes,wokamoto,miyauchi,hnle
+Contributors: amimotoami,hideokamoto,megumithemes,wokamoto,miyauchi,hnle,bartoszgadomski
 Donate link: http://wp-kyoto.net/
 Tags: AWS,CDN,CloudFront
 Requires at least: 4.9.0
 Tested up to: 4.9.7
-Stable tag: 5.4.0
+Stable tag: 5.4.1
 License: GPLv3 or later
 License URI: http://www.gnu.org/licenses/gpl-3.0.html
 
@@ -94,6 +94,9 @@ add_filter( 'c3_select_aws_sdk', function() {
 
 == Changelog ==
 
+= 5.4.1 =
+* [Bug fix] Undefined Paths index in invalidation query cron event
+
 = 5.4.0 =
 * [Update] Update preview fix plugin