diff --git a/packages/nodes-base/nodes/InvoiceNinja/InvoiceNinja.node.ts b/packages/nodes-base/nodes/InvoiceNinja/InvoiceNinja.node.ts
index 63cf573123..a14643d6fe 100644
--- a/packages/nodes-base/nodes/InvoiceNinja/InvoiceNinja.node.ts
+++ b/packages/nodes-base/nodes/InvoiceNinja/InvoiceNinja.node.ts
@@ -418,7 +418,12 @@ export class InvoiceNinja implements INodeType {
 							body.invoice_date = additionalFields.invoiceDate as string;
 						}
 						if (additionalFields.invoiceNumber) {
-							body.invoice_number = additionalFields.invoiceNumber as string;
+							if (apiVersion === 'v4') {
+								body.invoice_number = additionalFields.invoiceNumber as string;
+							} else if (apiVersion === 'v5') {
+								// eslint-disable-next-line id-denylist
+								body.number = additionalFields.invoiceNumber as string;
+							}
 						}
 						if (additionalFields.invoiceStatus) {
 							body.invoice_status_id = additionalFields.invoiceStatus as number;
@@ -858,7 +863,12 @@ export class InvoiceNinja implements INodeType {
 							body.invoice_date = additionalFields.quouteDate as string;
 						}
 						if (additionalFields.quoteNumber) {
-							body.invoice_number = additionalFields.quoteNumber as string;
+							if (apiVersion === 'v4') {
+								body.invoice_number = additionalFields.quoteNumber as string;
+							} else if (apiVersion === 'v5') {
+								// eslint-disable-next-line id-denylist
+								body.number = additionalFields.quoteNumber as string;
+							}
 						}
 						if (additionalFields.invoiceStatus) {
 							body.invoice_status_id = additionalFields.invoiceStatus as number;
diff --git a/packages/nodes-base/nodes/InvoiceNinja/QuoteInterface.ts b/packages/nodes-base/nodes/InvoiceNinja/QuoteInterface.ts
index f1e5329e41..7784f880c7 100644
--- a/packages/nodes-base/nodes/InvoiceNinja/QuoteInterface.ts
+++ b/packages/nodes-base/nodes/InvoiceNinja/QuoteInterface.ts
@@ -23,6 +23,8 @@ export interface IQuote {
 	invoice_items?: IItem[];
 	line_items?: IItem[];
 	invoice_number?: string;
+	// eslint-disable-next-line id-denylist
+	number?: string;
 	invoice_status_id?: number;
 	is_amount_discount?: boolean;
 	is_quote?: boolean;
diff --git a/packages/nodes-base/nodes/InvoiceNinja/invoiceInterface.ts b/packages/nodes-base/nodes/InvoiceNinja/invoiceInterface.ts
index 22a8728ae4..752fbbf4a7 100644
--- a/packages/nodes-base/nodes/InvoiceNinja/invoiceInterface.ts
+++ b/packages/nodes-base/nodes/InvoiceNinja/invoiceInterface.ts
@@ -23,6 +23,8 @@ export interface IInvoice {
 	invoice_items?: IItem[];
 	line_items?: IItem[];
 	invoice_number?: string;
+	// eslint-disable-next-line id-denylist
+	number?: string;
 	invoice_status_id?: number;
 	is_amount_discount?: boolean;
 	paid?: number;