diff --git a/lib/Model/Search/AttributeToUpdate.php b/lib/Model/Search/AttributeToUpdate.php
index 9630ef7a..4fdaedf5 100644
--- a/lib/Model/Search/AttributeToUpdate.php
+++ b/lib/Model/Search/AttributeToUpdate.php
@@ -20,7 +20,7 @@ class AttributeToUpdate extends AbstractModel implements ModelInterface, \ArrayA
      */
     protected static $modelTypes = [
         'operation' => '\Algolia\AlgoliaSearch\Model\Search\BuiltInOperationType',
-        'value' => 'string',
+        'value' => '\Algolia\AlgoliaSearch\Model\Search\BuiltInOperationValue',
     ];
 
     /**
@@ -194,7 +194,7 @@ public function setOperation($operation)
     /**
      * Gets value.
      *
-     * @return string
+     * @return BuiltInOperationValue
      */
     public function getValue()
     {
@@ -204,7 +204,7 @@ public function getValue()
     /**
      * Sets value.
      *
-     * @param string $value value that corresponds to the operation, for example an `Increment` or `Decrement` step, or an `Add` or `Remove` value
+     * @param BuiltInOperationValue $value value
      *
      * @return self
      */
diff --git a/lib/Model/Search/BuiltInOperation.php b/lib/Model/Search/BuiltInOperation.php
index 99221bf8..ca4404af 100644
--- a/lib/Model/Search/BuiltInOperation.php
+++ b/lib/Model/Search/BuiltInOperation.php
@@ -22,7 +22,7 @@ class BuiltInOperation extends AbstractModel implements ModelInterface, \ArrayAc
      */
     protected static $modelTypes = [
         'operation' => '\Algolia\AlgoliaSearch\Model\Search\BuiltInOperationType',
-        'value' => 'string',
+        'value' => '\Algolia\AlgoliaSearch\Model\Search\BuiltInOperationValue',
     ];
 
     /**
@@ -196,7 +196,7 @@ public function setOperation($operation)
     /**
      * Gets value.
      *
-     * @return string
+     * @return BuiltInOperationValue
      */
     public function getValue()
     {
@@ -206,7 +206,7 @@ public function getValue()
     /**
      * Sets value.
      *
-     * @param string $value value that corresponds to the operation, for example an `Increment` or `Decrement` step, or an `Add` or `Remove` value
+     * @param BuiltInOperationValue $value value
      *
      * @return self
      */
diff --git a/lib/Model/Search/BuiltInOperationValue.php b/lib/Model/Search/BuiltInOperationValue.php
new file mode 100644
index 00000000..c2f0347a
--- /dev/null
+++ b/lib/Model/Search/BuiltInOperationValue.php
@@ -0,0 +1,191 @@
+<?php
+
+// Code generated by OpenAPI Generator (https://openapi-generator.tech), manual changes will be lost - read more on https://github.com/algolia/api-clients-automation. DO NOT EDIT.
+
+namespace Algolia\AlgoliaSearch\Model\Search;
+
+use Algolia\AlgoliaSearch\Model\AbstractModel;
+
+/**
+ * BuiltInOperationValue Class Doc Comment.
+ *
+ * @category Class
+ */
+class BuiltInOperationValue extends AbstractModel implements ModelInterface, \ArrayAccess, \JsonSerializable
+{
+    /**
+     * Array of property to type mappings. Used for (de)serialization.
+     *
+     * @var string[]
+     */
+    protected static $modelTypes = [
+    ];
+
+    /**
+     * Array of property to format mappings. Used for (de)serialization.
+     *
+     * @var string[]
+     */
+    protected static $modelFormats = [
+    ];
+
+    /**
+     * Array of attributes where the key is the local name,
+     * and the value is the original name.
+     *
+     * @var string[]
+     */
+    protected static $attributeMap = [
+    ];
+
+    /**
+     * Array of attributes to setter functions (for deserialization of responses).
+     *
+     * @var string[]
+     */
+    protected static $setters = [
+    ];
+
+    /**
+     * Array of attributes to getter functions (for serialization of requests).
+     *
+     * @var string[]
+     */
+    protected static $getters = [
+    ];
+
+    /**
+     * Associative array for storing property values.
+     *
+     * @var mixed[]
+     */
+    protected $container = [];
+
+    /**
+     * Constructor.
+     *
+     * @param mixed[] $data Associated array of property values
+     */
+    public function __construct(?array $data = null) {}
+
+    /**
+     * Array of attributes where the key is the local name,
+     * and the value is the original name.
+     *
+     * @return array
+     */
+    public static function attributeMap()
+    {
+        return self::$attributeMap;
+    }
+
+    /**
+     * Array of property to type mappings. Used for (de)serialization.
+     *
+     * @return array
+     */
+    public static function modelTypes()
+    {
+        return self::$modelTypes;
+    }
+
+    /**
+     * Array of property to format mappings. Used for (de)serialization.
+     *
+     * @return array
+     */
+    public static function modelFormats()
+    {
+        return self::$modelFormats;
+    }
+
+    /**
+     * Array of attributes to setter functions (for deserialization of responses).
+     *
+     * @return array
+     */
+    public static function setters()
+    {
+        return self::$setters;
+    }
+
+    /**
+     * Array of attributes to getter functions (for serialization of requests).
+     *
+     * @return array
+     */
+    public static function getters()
+    {
+        return self::$getters;
+    }
+
+    /**
+     * Show all the invalid properties with reasons.
+     *
+     * @return array invalid properties with reasons
+     */
+    public function listInvalidProperties()
+    {
+        return [];
+    }
+
+    /**
+     * Validate all the properties in the model
+     * return true if all passed.
+     *
+     * @return bool True if all properties are valid
+     */
+    public function valid()
+    {
+        return 0 === count($this->listInvalidProperties());
+    }
+
+    /**
+     * Returns true if offset exists. False otherwise.
+     *
+     * @param int $offset Offset
+     *
+     * @return bool
+     */
+    public function offsetExists($offset)
+    {
+        return isset($this->container[$offset]);
+    }
+
+    /**
+     * Gets offset.
+     *
+     * @param int $offset Offset
+     *
+     * @return null|mixed
+     */
+    public function offsetGet($offset)
+    {
+        return $this->container[$offset] ?? null;
+    }
+
+    /**
+     * Sets value based on offset.
+     *
+     * @param null|int $offset Offset
+     * @param mixed    $value  Value to be set
+     */
+    public function offsetSet($offset, $value)
+    {
+        if (is_null($offset)) {
+            $this->container[] = $value;
+        } else {
+            $this->container[$offset] = $value;
+        }
+    }
+
+    /**
+     * Unsets offset.
+     *
+     * @param int $offset Offset
+     */
+    public function offsetUnset($offset)
+    {
+        unset($this->container[$offset]);
+    }
+}