diff --git a/packages/text-to-speech/src/index.ts b/packages/text-to-speech/src/index.ts
index 31afb853b..506ebf22f 100644
--- a/packages/text-to-speech/src/index.ts
+++ b/packages/text-to-speech/src/index.ts
@@ -241,8 +241,8 @@ export const textToSpeechStreamingHandler = Sentry.GCPFunction.wrapHttpFunction(
 
     // create redis client
     const redisClient = createRedisClient(
-      process.env.REDIS_URL,
-      process.env.REDIS_CERT
+      process.env.REDIS_TTS_URL,
+      process.env.REDIS_TTS_CERT
     )
 
     try {