diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e009a8..c68a730 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased]
+
+### Fixed
+
+- Decode dynamic group search filter as an array instead of an object
+
 ## [1.1.3] - 2026-05-05
 
 ### Fixed
diff --git a/inc/computergroupdynamic.class.php b/inc/computergroupdynamic.class.php
index 8c4492d..a61eac8 100644
--- a/inc/computergroupdynamic.class.php
+++ b/inc/computergroupdynamic.class.php
@@ -29,6 +29,7 @@
  */
 
 use function Safe\json_decode;
+use function Safe\unserialize;
 use function Safe\json_encode;
 use function Safe\ob_start;
 use function Safe\ob_get_clean;
@@ -182,7 +183,7 @@ private function countDynamicItems()
     public function isDynamicSearchMatchComputer(Computer $computer)
     {
         // add new criteria to force computer ID
-        $search = json_decode((string) $this->fields['search']);
+        $search = json_decode((string) $this->fields['search'], true, 512, JSON_THROW_ON_ERROR);
 
         $search['criteria'][] = [
             'link'       => 'AND',