diff --git a/core/views/ui/drilldown.py b/core/views/ui/drilldown.py
index db1f06c..ab01165 100644
--- a/core/views/ui/drilldown.py
+++ b/core/views/ui/drilldown.py
@@ -94,7 +94,7 @@ def make_graph(results):
                 "date": date,
             }
         )
-    return orjson.dumps(graph)
+    return orjson.dumps(graph).decode("utf-8")
 
 
 def drilldown_search(request, return_context=False, template=None):