diff --git a/docker/backend/sat.conf b/docker/backend/sat.conf
index 0a1e3f80..e8fb01e0 100644
--- a/docker/backend/sat.conf
+++ b/docker/backend/sat.conf
@@ -1,2 +1,6 @@
 [DEFAULT]
 media_dir = /home/sat/sat_media
+
+[jp]
+# FIXME: default "auto" value cause trouble
+background = dark