diff --git a/static/config.json b/static/config.json
index becc1d34ae..b2fff8409b 100644
--- a/static/config.json
+++ b/static/config.json
@@ -25,7 +25,7 @@
   "showInstanceSpecificPanel": true,
   "sidebarRight": false,
   "subjectLineBehavior": "noop",
-  "theme": "wavemaster",
+  "theme": "halloween",
   "useContainFit": true,
   "webPushNotifications": false,
   "scopeOptionsEnabled": true,