diff --git a/index.md b/index.md
index d3fa1fc4195d6d19ab690d3754059ae77828121e..3efe29778882c6c5c50827bc804316ee43be64e3 100644
--- a/index.md
+++ b/index.md
@@ -25,6 +25,6 @@ sansfont: Sans Serif
 - [7.2 Traits](traits.html).
 - [8.1 Tests](tests.html).
 - [8.2 Vecteurs](vec.html).
-- [9.1 Collections: String, HashMap](collections.html).
-- [9.2 Itérateurs](iterators.html).
-- [10.1 Lifetimes](lifetimes.html).
+- [11.1 Itérateurs](iterators.html).
+- [12.1 Unsafe Rust](collections.html).
+- [13.1 Lifetimes](lifetimes.html).