diff --git a/docker-compose.yml b/docker-compose.yml
index 8d785b5..a6c83f1 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -8,7 +8,7 @@ services:
     container_name: threetwo-ui
     restart: unless-stopped
     environment:
-      UNDERLYING_HOST: ghost
+      UNDERLYING_HOST: $UNDERLYING_HOST
     volumes:
       - $COMICS_DIRECTORY:/comics
       - $USERDATA_DIRECTORY:/userdata