diff --git a/dev/resources/iso-normes/address_format.txt b/dev/resources/iso-normes/address_format.txt
index cc3b23285c8..d87e90e79b5 100644
--- a/dev/resources/iso-normes/address_format.txt
+++ b/dev/resources/iso-normes/address_format.txt
@@ -1 +1,4 @@
-http://bitboost.com/ref/international-address-formats.html#Formats
\ No newline at end of file
+https://bitboost.com/ref/international-address-formats.html#Formats
+
+https://www.upu.int/en/Postal-Solutions/Programmes-Services/Addressing-Solutions
+