diff --git a/.changeset/real-rules-peel.md b/.changeset/real-rules-peel.md
new file mode 100644
index 00000000..df2dc895
--- /dev/null
+++ b/.changeset/real-rules-peel.md
@@ -0,0 +1,5 @@
+---
+"@rebilly/client-php": patch
+---
+
+fix(api-definitions): Add missing cancel category entries Rebilly/rebilly#6146
diff --git a/src/Model/Subscription.php b/src/Model/Subscription.php
index df3291aa..ae63506e 100644
--- a/src/Model/Subscription.php
+++ b/src/Model/Subscription.php
@@ -66,6 +66,8 @@ class Subscription implements SubscriptionOrOneTimeSale
 
     public const CANCEL_CATEGORY_BILLING_FAILURE = 'billing-failure';
 
+    public const CANCEL_CATEGORY_DELINQUENCY = 'delinquency';
+
     public const CANCEL_CATEGORY_DID_NOT_USE = 'did-not-use';
 
     public const CANCEL_CATEGORY_DID_NOT_WANT = 'did-not-want';
@@ -86,6 +88,8 @@ class Subscription implements SubscriptionOrOneTimeSale
 
     public const CANCEL_CATEGORY_SWITCHED_PLAN = 'switched-plan';
 
+    public const CANCEL_CATEGORY_ORGANIZATION_DEACTIVATED = 'organization-deactivated';
+
     public const CANCEL_CATEGORY_OTHER = 'other';
 
     public const CANCEL_CATEGORY_NULL = 'null';