diff --git a/python/erpnext.nix b/python/erpnext.nix
index df8646d..e12dfe8 100644
--- a/python/erpnext.nix
+++ b/python/erpnext.nix
@@ -14,6 +14,7 @@
 # Integration dependencies
 , googlemaps
 , plaid-python
+, python-stdnum
 , python-youtube
 , pypng
 }:
@@ -54,6 +55,7 @@ buildPythonPackage rec {
     # Integration dependencies
     googlemaps
     plaid-python
+    python-stdnum
     python-youtube
     # used for QR code generation
     pypng