diff --git a/packages/qvac-lib-infer-onnx-tts/benchmarks/server/src/utils/helper.js b/packages/qvac-lib-infer-onnx-tts/benchmarks/server/src/utils/helper.js
index 5baedd3ba2..fa849c7c8f 100644
--- a/packages/qvac-lib-infer-onnx-tts/benchmarks/server/src/utils/helper.js
+++ b/packages/qvac-lib-infer-onnx-tts/benchmarks/server/src/utils/helper.js
@@ -2,18 +2,26 @@
 
 const Buffer = require('bare-buffer')
 
+const MAX_BODY_SIZE = 1 * 1024 * 1024 // 1 MB
+
 /**
  * Process incoming JSON request body
  */
 async function processJsonRequest (req) {
   return new Promise((resolve, reject) => {
     const chunks = []
+    let received = 0
     req.on('data', chunk => {
+      received += chunk.length
+      if (received > MAX_BODY_SIZE) {
+        req.destroy(new Error('Payload too large'))
+        return
+      }
       chunks.push(chunk)
     })
     req.on('end', () => {
       try {
-        const buffer = Buffer.concat(chunks)
+        const buffer = Buffer.concat(chunks, received)
         const body = JSON.parse(buffer.toString())
         resolve(body)
       } catch (err) {