diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4bdd971532..c9227a8ba4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release Notes for Craft Commerce
 
+## 4.2.5.1 - 2023-02-02
+
+- Fixed a PHP error that occurred when retrieving orders with missing line item descriptions or SKUs. ([#2936](https://github.com/craftcms/commerce/issues/2936))
+
 ## 4.2.5 - 2023-02-01
 
 - Added support for searching for orders by customer name. ([#3050](https://github.com/craftcms/commerce/issues/3050))
diff --git a/src/models/LineItem.php b/src/models/LineItem.php
index c04884f829..fd7581abad 100644
--- a/src/models/LineItem.php
+++ b/src/models/LineItem.php
@@ -316,14 +316,17 @@ public function getDescription(): string
     }
 
     /**
-     * @param string $description
+     * @param ?string $description
      * @return void
      */
-    public function setDescription(string $description): void
+    public function setDescription(?string $description): void
     {
-        $this->_description = $description;
+        $this->_description = (string)$description;
     }
 
+    /**
+     * @return string
+     */
     public function getSku(): string
     {
         if (!$this->_sku) {
@@ -334,9 +337,13 @@ public function getSku(): string
         return $this->_sku;
     }
 
-    public function setSku(string $sku): void
+    /**
+     * @param ?string $sku
+     * @return void
+     */
+    public function setSku(?string $sku): void
     {
-        $this->_sku = $sku;
+        $this->_sku = (string)$sku;
     }
 
     /**