diff --git a/static/config.json b/static/config.json
index 6dbd55709c..495d9d7036 100644
--- a/static/config.json
+++ b/static/config.json
@@ -1,6 +1,6 @@
 {
   "theme": "retro",
-  "background": "/static/space_lolis.jpg",
+  "background": "/static/space_lolis.png",
   "logo": "/static/panda.png",
   "logoMask": false,
   "logoMargin": "0.1em",