diff --git a/README.md b/README.md
index ec7101ec..d5f1d81d 100644
--- a/README.md
+++ b/README.md
@@ -536,3 +536,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 204. Count Primes                                               | [Link](https://leetcode.com/problems/count-primes/)                                               | [Link](./lib/medium/204_count_primes.rb)                                               | [Link](./test/medium/test_204_count_primes.rb)                                               |
 | 208. Implement Trie (Prefix Tree)                               | [Link](https://leetcode.com/problems/implement-trie-prefix-tree/)                                 | [Link](./lib/medium/208_implement_trie_prefix_tree.rb)                                 | [Link](./test/medium/test_208_implement_trie_prefix_tree.rb)                                 |
 | 209. Minimum Size Subarray Sum                                  | [Link](https://leetcode.com/problems/minimum-size-subarray-sum/)                                  | [Link](./lib/medium/209_minimum_size_subarray_sum.rb)                                  | [Link](./test/medium/test_209_minimum_size_subarray_sum.rb)                                  |
+| 215. Kth Largest Element in an Array                            | [Link](https://leetcode.com/problems/kth-largest-element-in-an-array/)                            | [Link](./lib/medium/215_kth_largest_element_in_an_array.rb)                            | [Link](./test/medium/test_215_kth_largest_element_in_an_array.rb)                            |
diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index 9bfa66ea..e52158a3 100644
--- a/leetcode-ruby.gemspec
+++ b/leetcode-ruby.gemspec
@@ -5,7 +5,7 @@ require 'English'
 ::Gem::Specification.new do |s|
   s.required_ruby_version = '>= 3.0'
   s.name = 'leetcode-ruby'
-  s.version = '6.7.0'
+  s.version = '6.7.1'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'
diff --git a/lib/medium/215_kth_largest_element_in_an_array.rb b/lib/medium/215_kth_largest_element_in_an_array.rb
new file mode 100644
index 00000000..83bbb2b6
--- /dev/null
+++ b/lib/medium/215_kth_largest_element_in_an_array.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/kth-largest-element-in-an-array/description/
+# @param {Integer[]} nums
+# @param {Integer} k
+# @return {Integer}
+def find_kth_largest(nums, k) = nums.max(k).last
diff --git a/test/medium/test_215_kth_largest_element_in_an_array.rb b/test/medium/test_215_kth_largest_element_in_an_array.rb
new file mode 100644
index 00000000..c5b248fb
--- /dev/null
+++ b/test/medium/test_215_kth_largest_element_in_an_array.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/215_kth_largest_element_in_an_array'
+require 'minitest/autorun'
+
+class KthLargestElementInAnArrayTest < ::Minitest::Test
+  def test_default_one
+    assert_equal(
+      5,
+      find_kth_largest(
+        [3, 2, 1, 5, 6, 4],
+        2
+      )
+    )
+  end
+
+  def test_default_two
+    assert_equal(
+      4,
+      find_kth_largest(
+        [3, 2, 3, 1, 2, 4, 5, 5, 6],
+        4
+      )
+    )
+  end
+end