diff --git a/todo5.txt b/todo5.txt
index ccc44c5..5ff84e1 100644
--- a/todo5.txt
+++ b/todo5.txt
@@ -1,4 +1,5 @@
 https://github.com/isocpp/CppCoreGuidelines
+https://github.com/lefticus/cppbestpractices
 https://github.com/Microsoft/GSL
 https://github.com/scylladb/seastar
 https://github.com/google/brotli