diff --git a/docker/gpu/docker-compose.yml b/docker/gpu/docker-compose.yml
index 9989e18..7cb4b94 100644
--- a/docker/gpu/docker-compose.yml
+++ b/docker/gpu/docker-compose.yml
@@ -35,3 +35,5 @@ services:
       - GRADIO_WATCH=1  # Enable hot reloading
       - PYTHONUNBUFFERED=1  # Ensure Python output is not buffered
       - DISABLE_LOCAL_SAVING=false  # Set to 'true' to disable local saving and hide file view
+      - API_HOST=kokoro-tts  # Set TTS service URL
+      - API_PORT=8880  # Set TTS service PORT