diff --git a/cors-proxy/index.mjs b/cors-proxy/index.mjs
index 0a7cf758..abc787af 100644
--- a/cors-proxy/index.mjs
+++ b/cors-proxy/index.mjs
@@ -3,9 +3,11 @@ import process from 'node:process';
 export const handler = async (event) => {
   const targetUrl = process.env.PROXY_TARGET_URL;
 
+  const body = event?.isBase64Encoded ? atob(event.body) : event.body;
+
   const response = await fetch(targetUrl, {
     method: 'POST',
-    body: event.body,
+    body,
     headers: {
       'Content-type': 'application/x-www-form-urlencoded',
     },
@@ -29,6 +31,7 @@ export const handler = async (event) => {
     statusCode: response.status,
     message: response.message,
     headers: response.headers,
+    targetUrl,
   });
 
   return {
diff --git a/cors-proxy/server.mjs b/cors-proxy/server.mjs
index 63250a5b..6b82c4ce 100644
--- a/cors-proxy/server.mjs
+++ b/cors-proxy/server.mjs
@@ -2,6 +2,7 @@ import http from 'http';
 import { handler } from './index.mjs';
 import url from 'url';
 import process from 'node:process';
+import { Buffer } from 'node:buffer';
 
 const allowedOrigin = process.env.PROXY_ALLOWED_ORIGIN || '*';
 
@@ -43,7 +44,8 @@ const server = http.createServer(async (req, res) => {
     const lambdaEvent = {
       httpMethod: req.method,
       queryStringParameters: parsedUrl.query,
-      body: body,
+      body: Buffer.from(body).toString('base64'),
+      isBase64Encoded: true,
     };
 
     // Call the handler (same code used in AWS Lambda)