diff --git a/docker-compose.yml b/docker-compose.yml
index 57f3d80..8d87f79 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -178,6 +178,7 @@ services:
       GEMINI_API_KEY: ${GEMINI_API_KEY}
       TRANSLATE_API_KEY: ${TRANSLATE_API_KEY:-}
       ELEVENLABS_API_KEY: ${ELEVENLABS_API_KEY:-}
+      GOOGLE_TTS_CREDENTIALS: /secrets/gcp-credentials.json
 
       # Email
       SENDGRID_API_KEY: ${SENDGRID_API_KEY:-}