diff --git a/CHANGELOG.md b/CHANGELOG.md
index e381e92..0f66a0c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file. This projec
 to [Semantic Versioning] (http://semver.org/). For change log format,
 use [Keep a Changelog] (http://keepachangelog.com/).
 
+## [2.5.2] - 2024-12-04
+
+### Fixed
+
+- Prevent unserialize with no options
+
 ## [2.5.1] - 2024-12-03
 
 ### Fixed
diff --git a/src/Router.php b/src/Router.php
index 89e2c10..355e84e 100644
--- a/src/Router.php
+++ b/src/Router.php
@@ -71,8 +71,8 @@ public function __serialize(): array
      */
     public function __unserialize(array $data): void
     {
-        $this->options = $data['options'];
-        $this->routes = $data['routes'];
+        $this->options = $data['options'] ?? [];
+        $this->routes = $data['routes'] ?? [];
     }
 
     /**