diff --git a/garbage_collection/README.md b/garbage_collection/README.md
index b8131a9..11d6ca4 100644
--- a/garbage_collection/README.md
+++ b/garbage_collection/README.md
@@ -1,4 +1,4 @@
-* [A Unified Theory of Garbage Collection](https://dl.acm.org/doi/pdf/10.1145/1035292.1028982)
+* [A Unified Theory of Garbage Collection](https://researcher.watson.ibm.com/researcher/files/us-bacon/Bacon04Unified.pdf)
     > An overview for programmers and language implementors for understanding different garbage collection algorithms.
 * [A LISP Garbage-Collector for Virtual-Memory Computer Systems](https://www.cs.purdue.edu/homes/hosking/690M/p611-fenichel.pdf)