diff --git a/subscriptions/admin.py b/subscriptions/admin.py
index 2b68d96..459fa64 100644
--- a/subscriptions/admin.py
+++ b/subscriptions/admin.py
@@ -3,7 +3,7 @@ from .models import ASSNotification
 
 class ASSNotificationAdmin(admin.ModelAdmin):
     list_display = ['notificationType', 'subtype', 'signedDate', 'transactionId', 'price']
-    search_fields = ('transactionId')
+    search_fields = ['transactionId']
     list_filter = []
     ordering = ['-signedDate']