diff --git a/hosts/whitelist.txt b/hosts/whitelist.txt
index 6b44c23..4929a06 100755
--- a/hosts/whitelist.txt
+++ b/hosts/whitelist.txt
@@ -1,6 +1,9 @@
 ## This whitelist maintaince by @ookangzheng
 ## Attribution-NonCommercial 4.0 International (CC BY-NC-SA 4.0)
 
+# Site assets for realpython.onfastspring.com
+d1f8f9xcsvx3ha.cloudfront.net
+
 # amazon.de
 djvbdz1obemzo.cloudfront.net # CNAME