diff --git a/packages/nodes-base/nodes/SendGrid/SendGrid.node.ts b/packages/nodes-base/nodes/SendGrid/SendGrid.node.ts
index ca640e89de..2a45e20137 100644
--- a/packages/nodes-base/nodes/SendGrid/SendGrid.node.ts
+++ b/packages/nodes-base/nodes/SendGrid/SendGrid.node.ts
@@ -456,8 +456,10 @@ export class SendGrid implements INodeType {
 
 								const binaryProperty = items[i].binary![property];
 
+								const dataBuffer = await this.helpers.getBinaryDataBuffer(i, property);
+
 								attachmentsToSend.push({
-									content: binaryProperty.data,
+									content: dataBuffer.toString('base64'),
 									filename: binaryProperty.fileName || 'unknown',
 									type: binaryProperty.mimeType,
 								});