diff --git a/packages/nodes-base/nodes/Signl4/GenericFunctions.ts b/packages/nodes-base/nodes/Signl4/GenericFunctions.ts
index 5281ae8c25ede..78e745e76cfb8 100644
--- a/packages/nodes-base/nodes/Signl4/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Signl4/GenericFunctions.ts
@@ -8,17 +8,26 @@ import {
 
 import {
 	OptionsWithUri,
- } from 'request';
+} from 'request';
 
 /**
  * Make an API request to SIGNL4
  *
  * @param {IHookFunctions | IExecuteFunctions} this
- * @param {object} message
+ * @param {string} method
+ * @param {string} contentType
+ * @param {string} body
+ * @param {object} query
+ * @param {string} teamSecret
+ * @param {object} options
  * @returns {Promise<any>}
+ *
  */
 
-export async function SIGNL4ApiRequest(this: IExecuteFunctions, method: string, resource: string, body: any = {}, query: IDataObject = {}, uri?: string, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
+export async function SIGNL4ApiRequest(this: IExecuteFunctions, method: string, body: string, query: IDataObject = {}, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
+	const credentials = this.getCredentials('signl4Api');
+
+	const teamSecret = credentials?.teamSecret as string;
 
 	let options: OptionsWithUri = {
 		headers: {
@@ -27,7 +36,7 @@ export async function SIGNL4ApiRequest(this: IExecuteFunctions, method: string,
 		method,
 		body,
 		qs: query,
-		uri: uri || ``,
+		uri: `https://connect.signl4.com/webhook/${teamSecret}`,
 		json: true,
 	};
 
diff --git a/packages/nodes-base/nodes/Signl4/Signl4.node.json b/packages/nodes-base/nodes/Signl4/Signl4.node.json
index e6e06e864fcad..8337da9d3017e 100644
--- a/packages/nodes-base/nodes/Signl4/Signl4.node.json
+++ b/packages/nodes-base/nodes/Signl4/Signl4.node.json
@@ -1,7 +1,7 @@
 {
 	"node": "n8n-nodes-base.signl4",
-	"nodeVersion": "1.0",
-	"codexVersion": "1.0",
+	"nodeVersion": "1.1",
+	"codexVersion": "1.1",
 	"categories": [
 		"Communication",
 		"Development"
diff --git a/packages/nodes-base/nodes/Signl4/Signl4.node.ts b/packages/nodes-base/nodes/Signl4/Signl4.node.ts
index 2b8defc44095e..1a729502ab68e 100644
--- a/packages/nodes-base/nodes/Signl4/Signl4.node.ts
+++ b/packages/nodes-base/nodes/Signl4/Signl4.node.ts
@@ -264,20 +264,18 @@ export class Signl4 implements INodeType {
 				// Send alert
 				if (operation === 'send') {
 					const message = this.getNodeParameter('message', i) as string;
-					const additionalFields = this.getNodeParameter('additionalFields',i) as IDataObject;
+					const additionalFields = this.getNodeParameter('additionalFields', i) as IDataObject;
 
 					const data: IDataObject = {
 						message,
 					};
 
-					if (additionalFields.alertingScenario) {
-						data['X-S4-AlertingScenario'] = additionalFields.alertingScenario as string;
-					}
-					if (additionalFields.externalId) {
-						data['X-S4-ExternalID'] = additionalFields.externalId as string;
+					if (additionalFields.title) {
+						data.title = additionalFields.title as string;
 					}
-					if (additionalFields.filtering) {
-						data['X-S4-Filtering'] = (additionalFields.filtering as boolean).toString();
+
+					if (additionalFields.service) {
+						data.service = additionalFields.service as string;
 					}
 					if (additionalFields.locationFieldsUi) {
 						const locationUi = (additionalFields.locationFieldsUi as IDataObject).locationFieldsValues as IDataObject;
@@ -285,16 +283,25 @@ export class Signl4 implements INodeType {
 							data['X-S4-Location'] = `${locationUi.latitude},${locationUi.longitude}`;
 						}
 					}
-					if (additionalFields.service) {
-						data['X-S4-Service'] = additionalFields.service as string;
+
+					if (additionalFields.alertingScenario) {
+						data['X-S4-AlertingScenario'] = additionalFields.alertingScenario as string;
 					}
-					data['X-S4-Status'] = 'new';
-					if (additionalFields.title) {
-						data['title'] = additionalFields.title as string;
+
+					if (additionalFields.filtering) {
+						data['X-S4-Filtering'] = (additionalFields.filtering as boolean).toString();
 					}
 
-					const attachments = additionalFields.attachmentsUi as IDataObject;
+					if (additionalFields.externalId) {
+						data['X-S4-ExternalID'] = additionalFields.externalId as string;
+					}
 
+					data['X-S4-Status'] = 'new';
+
+					data['X-S4-SourceSystem'] = 'n8n';
+
+					// Attachments
+					const attachments = additionalFields.attachmentsUi as IDataObject;
 					if (attachments) {
 						if (attachments.attachmentsBinary && items[i].binary) {
 
@@ -304,14 +311,14 @@ export class Signl4 implements INodeType {
 
 							if (binaryProperty) {
 
-								const supportedFileExtension = ['png', 'jpg', 'txt'];
+								const supportedFileExtension = ['png', 'jpg', 'jpeg', 'bmp', 'gif', 'mp3', 'wav'];
 
 								if (!supportedFileExtension.includes(binaryProperty.fileExtension as string)) {
 
 									throw new Error(`Invalid extension, just ${supportedFileExtension.join(',')} are supported}`);
 								}
 
-								data['file'] = {
+								data.attachment = {
 									value: Buffer.from(binaryProperty.data, BINARY_ENCODING),
 									options: {
 										filename: binaryProperty.fileName,
@@ -325,18 +332,14 @@ export class Signl4 implements INodeType {
 						}
 					}
 
-					const credentials = this.getCredentials('signl4Api');
-
-					const endpoint = `https://connect.signl4.com/webhook/${credentials?.teamSecret}`;
-
 					responseData = await SIGNL4ApiRequest.call(
 						this,
 						'POST',
 						'',
-						data,
-						{},
-						endpoint,
 						{},
+						{
+							formData: data,
+						},
 					);
 				}
 				// Resolve alert
@@ -348,26 +351,24 @@ export class Signl4 implements INodeType {
 
 					data['X-S4-Status'] = 'resolved';
 
-					const credentials = this.getCredentials('signl4Api');
-
-					const endpoint = `https://connect.signl4.com/webhook/${credentials?.teamSecret}`;
+					data['X-S4-SourceSystem'] = 'n8n';
 
 					responseData = await SIGNL4ApiRequest.call(
 						this,
 						'POST',
 						'',
-						data,
-						{},
-						endpoint,
 						{},
+						{
+							formData: data,
+						},
 					);
 				}
 			}
-		}
-		if (Array.isArray(responseData)) {
-			returnData.push.apply(returnData, responseData as IDataObject[]);
-		} else if (responseData !== undefined) {
-			returnData.push(responseData as IDataObject);
+			if (Array.isArray(responseData)) {
+				returnData.push.apply(returnData, responseData as IDataObject[]);
+			} else if (responseData !== undefined) {
+				returnData.push(responseData as IDataObject);
+			}
 		}
 		return [this.helpers.returnJsonArray(returnData)];
 	}