diff --git a/docker-compose.env b/docker-compose.env
new file mode 100644
index 0000000..d244be1
--- /dev/null
+++ b/docker-compose.env
@@ -0,0 +1 @@
+UNDERLYING_HOSTNAME=rook
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
index be907ce..5d06771 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -7,8 +7,6 @@ services:
     image: frishi/threetwo
     container_name: threetwo-ui
     env_file: ./docker-compose.env
-    environment:
-      UNDERLYING_HOSTNAME: rook
     restart: unless-stopped
     ports:
       - "8050:8050"