diff --git a/CHANGES.md b/CHANGES.md
index d86a9d763..9471d66d8 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,6 @@
+## Version 8.8.6 (2024120500)
+* Bugfix: format string in customfields only for string
+
 ## Version 8.8.5 (2024120400)
 * Improvement: Nav tabs for mobile view
 * Bugfix: Prevent booking rules from being sent on inactive configuration
diff --git a/version.php b/version.php
index 04ca56ea9..a9ac953f3 100755
--- a/version.php
+++ b/version.php
@@ -25,9 +25,9 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version = 2024120400;
+$plugin->version = 2024120500;
 $plugin->requires = 2022112800; // Requires this Moodle version. Current: Moodle 4.1.
-$plugin->release = '8.8.5';
+$plugin->release = '8.8.6';
 $plugin->maturity = MATURITY_STABLE;
 $plugin->component = 'mod_booking';
 $plugin->supported = [401, 405];