diff --git a/core/admin.py b/core/admin.py
index f6d94544..589cecc8 100644
--- a/core/admin.py
+++ b/core/admin.py
@@ -363,10 +363,11 @@ class PromoCodeAdmin(FieldsetsMixin, BasicModelAdmin):
         "used_on",
     )
     list_filter = ("discount_percent", "discount_amount", "start_time", "end_time")
-    search_fields = ("code",)
-    readonly_fields = ("uuid", "modified", "created")
+    search_fields = ("code", )
+    readonly_fields = ("used_on", "uuid", "modified", "created")
+    autocomplete_fields = ("user",)
 
-    general_fields = ["code", "discount_amount", "discount_percent"]
+    general_fields = ["code", "discount_amount", "discount_percent", "start_time", "end_time", "used_on"]
     relation_fields = ["user"]