From b35e02e07d4bd2bcccd5c235bac807045523b637 Mon Sep 17 00:00:00 2001
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Date: Tue, 28 Jul 2026 00:24:47 +0000
Subject: [PATCH] =?UTF-8?q?=F0=9F=A4=96=20Auto-sync=20docs,=20metadata,=20?=
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---
 exercises/practice/perfect-numbers/.meta/config.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/exercises/practice/perfect-numbers/.meta/config.json b/exercises/practice/perfect-numbers/.meta/config.json
index a30cdfdd..55f716f2 100644
--- a/exercises/practice/perfect-numbers/.meta/config.json
+++ b/exercises/practice/perfect-numbers/.meta/config.json
@@ -20,5 +20,5 @@
   },
   "blurb": "Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for positive integers.",
   "source": "Taken from Chapter 2 of Functional Thinking by Neal Ford.",
-  "source_url": "https://www.oreilly.com/library/view/functional-thinking/9781449365509/"
+  "source_url": "https://nealford.com/books/functionalthinking.html"
 }