diff --git a/README.md b/README.md
index b1570df..803af52 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ This is an educational implementation and has several limitations compared to pr
 - Inefficient storage (full value copies rather than deltas)
 - Only supports point lookups (no range queries)
 - No indexes
-- Implements snapshot isolation, not serializable isolation
+- Implements snapshot isolation, not serializable isolation ([this branch does though](https://git.canoozie.net/jer/mvcc/src/branch/si)
 
 ## License