diff --git a/lib/src/constants.dart b/lib/src/constants.dart
index 87141ab95..9d5ba4523 100644
--- a/lib/src/constants.dart
+++ b/lib/src/constants.dart
@@ -325,8 +325,8 @@ const num ZOOM_THRESHOLD = 1;
 
 /////////////////////////////////////////////////////////////
 // Backend
-const export_url = 'http://51.89.138.231:9090/scadnano_to_cadnano_v2';
-const import_url = 'http://51.89.138.231:9090/cadnano_v2_to_scadnano';
+const export_url = 'https://os-interactive.ie/scadnano-backend/scadnano_to_cadnano_v2';
+const import_url = 'https://os-interactive.ie/scadnano-backend/cadnano_v2_to_scadnano';
 
 /////////////////////////////////////////////////////////////
 // CSS selector classnames
@@ -370,4 +370,4 @@ const css_selector_selected = 'selected';
 
 
 const default_idt_scale = "25nm";
-const default_idt_purification = "STD";
\ No newline at end of file
+const default_idt_purification = "STD";