diff --git a/.python-version b/.python-version
index a469d8fe8548..d5629d4841ea 100644
--- a/.python-version
+++ b/.python-version
@@ -1 +1 @@
-3.14t
+3.15t
diff --git a/DIRECTORY.md b/DIRECTORY.md
index d264265479eb..1bd9de35a8a1 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -454,6 +454,7 @@
   * [Minimum Steps To One](dynamic_programming/minimum_steps_to_one.py)
   * [Minimum Tickets Cost](dynamic_programming/minimum_tickets_cost.py)
   * [Narcissistic Number](dynamic_programming/narcissistic_number.py)
+  * [Needleman Wunsch](dynamic_programming/needleman_wunsch.py)
   * [Optimal Binary Search Tree](dynamic_programming/optimal_binary_search_tree.py)
   * [Palindrome Partitioning](dynamic_programming/palindrome_partitioning.py)
   * [Range Sum Query](dynamic_programming/range_sum_query.py)