diff --git a/core/views/ui/drilldown.py b/core/views/ui/drilldown.py
index 24153f1..5465148 100644
--- a/core/views/ui/drilldown.py
+++ b/core/views/ui/drilldown.py
@@ -1,7 +1,7 @@
 import urllib
 import uuid
 
-import ujson
+import orjson
 from django.conf import settings
 from django.http import HttpResponse, JsonResponse
 from django.shortcuts import render
@@ -95,7 +95,7 @@ def make_graph(results):
                 "date": date,
             }
         )
-    return ujson.dumps(graph)
+    return orjson.dumps(graph)
 
 
 def drilldown_search(request, return_context=False, template=None):