diff --git a/docker-compose.yml b/docker-compose.yml
index 223ede6..674f0e4 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -60,7 +60,7 @@ services:
     environment:
       TZ: ${TZ}
       VOICE_SAT_HOST: 192.168.1.248
-      VOICE_SAT_PORT: 5679
+      VOICE_SAT_PORT: ${VOICE_SAT_PORT:-5678}
       VOICE_SAT_KEY: ${HV_VOICE_SAT_KEY}
       VOICE_SAT_PASSWORD: ${HV_VOICE_SAT_PASSWORD}
       XDG_RUNTIME_DIR: ${XDG_RUNTIME_DIR}