diff --git a/lcsp/finder.rb b/lcsp/finder.rb
index 51225dbb..c679efb8 100644
--- a/lcsp/finder.rb
+++ b/lcsp/finder.rb
@@ -26,10 +26,11 @@ def solution
     # @param {String[]} dirs
     def fill_directories(path, dirs)
       ::Dir.foreach(path).reject { |name| name.start_with?('.') }.each do |entry|
-        unless ::File.file?("#{path}/#{entry}")
-          dirs << "#{path}/#{entry}"
-          fill_directories("#{path}/#{entry}", dirs)
-        end
+        next if ::File.file?("#{path}/#{entry}")
+
+        dirs << "#{path}/#{entry}"
+
+        fill_directories("#{path}/#{entry}", dirs)
       end
     end
   end
diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index 282232ae..fd3aecd1 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 = '6.2.3'
+  s.version = '6.2.3.1'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
   s.executable = 'leetcode-ruby'