diff --git a/contrib/ds-algorithms/index.md b/contrib/ds-algorithms/index.md
index 9c05b15..ecc4a10 100644
--- a/contrib/ds-algorithms/index.md
+++ b/contrib/ds-algorithms/index.md
@@ -15,4 +15,5 @@
 - [Trie](trie.md)
 - [Two Pointer Technique](two-pointer-technique.md)
 - [Hashing through Linear Probing](hashing-linear-probing.md)
-- [Hashing through Chaining](hashing-chaining.md)
\ No newline at end of file
+- [Hashing through Chaining](hashing-chaining.md)
+- [Binary Tree](binary_tree.md)