diff --git a/readme.md b/readme.md
index 5acc2557..73f2ede5 100644
--- a/readme.md
+++ b/readme.md
@@ -10,7 +10,7 @@ Sell Event Tickets on any post
 * Tags: tickets, events, WordPress
 * Requires at least: 4.7
 * Tested up to: 5.7
-* Stable tag: `1.8.23`
+* Stable tag: `1.8.24`
 * License: GPLv2 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
diff --git a/src/mt-button.php b/src/mt-button.php
index 9c1ce2ae..89b3f70b 100644
--- a/src/mt-button.php
+++ b/src/mt-button.php
@@ -799,9 +799,9 @@ function mt_set_user_unique_id() {
 					'httponly' => true,
 					'samesite' => 'Lax',
 				);
-				setcookie( 'mt_unique_id', 'true', $options );
+				setcookie( 'mt_unique_id', $unique_id, $options );
 			} else {
-				setcookie( 'mt_unique_id', 'true', time() + 60 * 60 * 24 * 7, SITECOOKIEPATH, COOKIE_DOMAIN, false, true );
+				setcookie( 'mt_unique_id', $unique_id, time() + 60 * 60 * 24 * 7, SITECOOKIEPATH, COOKIE_DOMAIN, false, true );
 			}
 		}
 	}
diff --git a/src/my-tickets.php b/src/my-tickets.php
index 056eedb2..315d2d3c 100644
--- a/src/my-tickets.php
+++ b/src/my-tickets.php
@@ -17,7 +17,7 @@
  * License:     GPL-2.0+
  * License URI: http://www.gnu.org/license/gpl-2.0.txt
  * Domain Path: lang
- * Version:     1.8.23
+ * Version:     1.8.24
  */
 
 /*
@@ -46,7 +46,7 @@
  * @return string Current My Tickets version.
  */
 function mt_get_current_version() {
-	$mt_version = '1.8.23';
+	$mt_version = '1.8.24';
 
 	return $mt_version;
 }
diff --git a/src/readme.txt b/src/readme.txt
index a764670c..d53aebd2 100644
--- a/src/readme.txt
+++ b/src/readme.txt
@@ -7,7 +7,7 @@ Tested up to: 5.7
 Requires PHP: 5.6
 License: GPLv2 or later
 Text domain: my-tickets
-Stable tag: 1.8.23
+Stable tag: 1.8.24
 
 My Tickets is an simple, flexible platform for selling event tickets with WordPress.
 
@@ -66,6 +66,10 @@ Read the <a href="http://docs.joedolson.com/my-tickets/">online documentation</a
 
 == Changelog ==
 
+= 1.8.24 =
+
+* Critical bug fix: error in unique ID cookie setting.
+
 = 1.8.23 =
 
 * Improved bug fix for removing events when ticket counts set to 0.