diff --git a/README.md b/README.md
index 10b31740..8e73df40 100644
--- a/README.md
+++ b/README.md
@@ -520,3 +520,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 142. Linked List Cycle II                                       | [Link](https://leetcode.com/problems/linked-list-cycle-ii/)                                       | [Link](./lib/medium/142_linked_list_cycle_ii.rb)                                       | [Link](./test/medium/test_142_linked_list_cycle_ii.rb)                                       |
 | 143. Reorder List                                               | [Link](https://leetcode.com/problems/reorder-list/)                                               | [Link](./lib/medium/143_reorder_list.rb)                                               | [Link](./test/medium/test_143_reorder_list.rb)                                               |
 | 146. LRU Cache                                                  | [Link](https://leetcode.com/problems/lru-cache/)                                                  | [Link](./lib/medium/146_lru_cache.rb)                                                  | [Link](./test/medium/test_146_lru_cache.rb)                                                  |
+| 147. Insertion Sort List                                        | [Link](https://leetcode.com/problems/insertion-sort-list/)                                        | [Link](./lib/medium/147_insertion_sort_list.rb)                                        | [Link](./test/medium/test_147_insertion_sort_list.rb)                                        |
diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index 6d9f521b..9ecaece1 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 = '6.5.4'
+  s.version = '6.5.5'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'
diff --git a/lib/medium/147_insertion_sort_list.rb b/lib/medium/147_insertion_sort_list.rb
new file mode 100644
index 00000000..309b0f98
--- /dev/null
+++ b/lib/medium/147_insertion_sort_list.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require_relative '../common/linked_list'
+
+# https://leetcode.com/problems/insertion-sort-list/
+# @param {ListNode} head
+# @return {ListNode}
+def insertion_sort_list(head)
+  result = ::ListNode.new
+  curr = head
+
+  while curr
+    prev = result
+
+    prev = prev.next while prev.next && prev.next.val <= curr.val
+
+    nxt = curr.next
+    curr.next = prev.next
+    prev.next = curr
+    curr = nxt
+  end
+
+  result.next
+end
diff --git a/test/medium/test_147_insertion_sort_list.rb b/test/medium/test_147_insertion_sort_list.rb
new file mode 100644
index 00000000..336fa3f7
--- /dev/null
+++ b/test/medium/test_147_insertion_sort_list.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/common/linked_list'
+require_relative '../../lib/medium/147_insertion_sort_list'
+require 'minitest/autorun'
+
+class InsertionSortListTest < ::Minitest::Test
+  def test_default_one
+    assert(
+      ::ListNode.are_equals(
+        ::ListNode.from_array(
+          [1, 2, 3, 4]
+        ),
+        insertion_sort_list(
+          ::ListNode.from_array(
+            [4, 2, 1, 3]
+          )
+        )
+      )
+    )
+  end
+
+  def test_default_two
+    assert(
+      ::ListNode.are_equals(
+        ::ListNode.from_array(
+          [-1, 0, 3, 4, 5]
+        ),
+        insertion_sort_list(
+          ::ListNode.from_array(
+            [-1, 5, 3, 4, 0]
+          )
+        )
+      )
+    )
+  end
+end