diff --git a/src/Entities/Adjustment.php b/src/Entities/Adjustment.php
index aa3dd97..3391d1f 100644
--- a/src/Entities/Adjustment.php
+++ b/src/Entities/Adjustment.php
@@ -42,7 +42,7 @@ private function __construct(
         public array $taxRatesUsed,
         public \DateTimeInterface $createdAt,
         public \DateTimeInterface|null $updatedAt,
-        public AdjustmentType|null $type,
+        public AdjustmentType $type,
     ) {
     }
 
@@ -64,7 +64,7 @@ public static function from(array $data): self
             taxRatesUsed: array_map(fn (array $taxRateUsed): AdjustmentTaxRatesUsed => AdjustmentTaxRatesUsed::from($taxRateUsed), $data['tax_rates_used'] ?? []),
             createdAt: DateTime::from($data['created_at']),
             updatedAt: DateTime::from($data['updated_at']),
-            type: isset($data['type']) ? AdjustmentType::from($data['type']) : null,
+            type: AdjustmentType::from($data['type']),
         );
     }
 }
diff --git a/tests/Functional/Resources/Adjustments/_fixtures/response/full_entity.json b/tests/Functional/Resources/Adjustments/_fixtures/response/full_entity.json
index 9b8f6bf..84e0afa 100644
--- a/tests/Functional/Resources/Adjustments/_fixtures/response/full_entity.json
+++ b/tests/Functional/Resources/Adjustments/_fixtures/response/full_entity.json
@@ -2,6 +2,7 @@
     "data": {
         "id": "adj_01h8c65c2ggq5nxswnnwv78e75",
         "action": "refund",
+        "type": "partial",
         "transaction_id": "txn_01h8bxpvx398a7zbawb77y0kp5",
         "subscription_id": "sub_01h8bxswamxysj44zt5n48njwh",
         "customer_id": "ctm_01h8441jn5pcwrfhwh78jqt8hk",
diff --git a/tests/Functional/Resources/Adjustments/_fixtures/response/list_default.json b/tests/Functional/Resources/Adjustments/_fixtures/response/list_default.json
index 746c380..8e777bb 100644
--- a/tests/Functional/Resources/Adjustments/_fixtures/response/list_default.json
+++ b/tests/Functional/Resources/Adjustments/_fixtures/response/list_default.json
@@ -3,6 +3,7 @@
         {
             "id": "adj_01h8c65c2ggq5nxswnnwv78e75",
             "action": "refund",
+            "type": "partial",
             "transaction_id": "txn_01h8bxpvx398a7zbawb77y0kp5",
             "subscription_id": "sub_01h8bxswamxysj44zt5n48njwh",
             "customer_id": "ctm_01h8441jn5pcwrfhwh78jqt8hk",
@@ -55,6 +56,7 @@
         {
             "id": "adj_01h8bxezh16gm6t8rx21dx271b",
             "action": "credit",
+            "type": "partial",
             "credit_applied_to_balance": true,
             "transaction_id": "txn_01h8bx69629a16wwm9z8rjmak3",
             "subscription_id": "sub_01h8bx8fmywym11t6swgzba704",
@@ -114,6 +116,7 @@
         {
             "id": "adj_01h7jgzjqt2s8sab70e03ptkhv",
             "action": "credit",
+            "type": "partial",
             "credit_applied_to_balance": true,
             "transaction_id": "txn_01h7jgd9bkwjscj3ae15g5d3vs",
             "subscription_id": "sub_01h7ht5z5wdg9pz18jx1fagp8k",
@@ -173,6 +176,7 @@
         {
             "id": "adj_01h7jf6ptkfsc93hzc20fgf8wy",
             "action": "credit",
+            "type": "partial",
             "credit_applied_to_balance": true,
             "transaction_id": "txn_01h7je77vc1qmzxntem45ebb5q",
             "subscription_id": "sub_01h7ht5z5wdg9pz18jx1fagp8k",
@@ -232,6 +236,7 @@
         {
             "id": "adj_01h468w41ttb2j2bh8av74gwt1",
             "action": "credit",
+            "type": "partial",
             "credit_applied_to_balance": true,
             "transaction_id": "txn_01h468crc3b3fe98a5ft53recb",
             "subscription_id": "sub_01h468kv3jhs5jk330gszncsgt",
diff --git a/tests/Functional/Resources/Adjustments/_fixtures/response/minimal_entity.json b/tests/Functional/Resources/Adjustments/_fixtures/response/minimal_entity.json
index 3a7c419..3d8e904 100644
--- a/tests/Functional/Resources/Adjustments/_fixtures/response/minimal_entity.json
+++ b/tests/Functional/Resources/Adjustments/_fixtures/response/minimal_entity.json
@@ -2,6 +2,7 @@
     "data": {
         "id": "adj_01h8c65c2ggq5nxswnnwv78e75",
         "action": "refund",
+        "type": "partial",
         "transaction_id": "txn_01h8bxpvx398a7zbawb77y0kp5",
         "subscription_id": "sub_01h8bxswamxysj44zt5n48njwh",
         "customer_id": "ctm_01h8441jn5pcwrfhwh78jqt8hk",