diff --git a/src/documents/barcodes.py b/src/documents/barcodes.py
index 3e2b309b6..005531107 100644
--- a/src/documents/barcodes.py
+++ b/src/documents/barcodes.py
@@ -105,7 +105,7 @@ class BarcodeReader:
             asn_text = asn_text[len(settings.CONSUMER_ASN_BARCODE_PREFIX) :].strip()
 
             # remove non-numeric parts of the remaining string
-            asn_text = re.sub("[^0-9]", "", asn_text)
+            asn_text = re.sub(r"\D", "", asn_text)
 
             # now, try parsing the ASN number
             try: