diff --git a/docs/new-contributor-guide-developer.md b/docs/new-contributor-guide-developer.md
index 3054d2a9..9e710e10 100644
--- a/docs/new-contributor-guide-developer.md
+++ b/docs/new-contributor-guide-developer.md
@@ -16,7 +16,7 @@ This document contains some useful resources for anyone wishing to contribute to
 
 ## Resources
 
-The [Wikipedia article on ropes](https://citeseer.ist.psu.edu/viewdoc/download?doi=10.1.1.14.9450&rep=rep1&type=pdf) provides an overview of the data structure.
+The [Wikipedia article on ropes](https://en.wikipedia.org/wiki/Rope_(data_structure)) provides an overview of the data structure.
 
 For some context, also see [Ropes: an Alternative to Strings](https://citeseer.ist.psu.edu/viewdoc/download?doi=10.1.1.14.9450&rep=rep1&type=pdf) by Boehm, Atkinson, and Plass.