diff --git a/routes/naturalLanguageRoute.js b/routes/naturalLanguageRoute.js
index 679b1c3..85b611a 100644
--- a/routes/naturalLanguageRoute.js
+++ b/routes/naturalLanguageRoute.js
@@ -5,7 +5,7 @@ const { authorization, } = require('../middleware/authentication')
 const { getSentiment, getAudioFromText, getVoiceConfig } = require('../controllers/naturalLanguageController')
 
 router.route('/sentiment').post(authorization, getSentiment)
-router.route('/text-to-speech').get(getAudioFromText)
+router.route('/text-to-speech').get(authorization, getAudioFromText)
 router.route('/voice-config').get(getVoiceConfig)
 
 module.exports = router