diff --git a/derailed_benchmarks.gemspec b/derailed_benchmarks.gemspec
index ba3ebb6..d9231a2 100644
--- a/derailed_benchmarks.gemspec
+++ b/derailed_benchmarks.gemspec
@@ -29,7 +29,7 @@ Gem::Specification.new do |gem|
   gem.add_dependency "rack",            ">= 1"
   gem.add_dependency "rake",            "> 10", "< 14"
   gem.add_dependency "thor",            ">= 0.19", "< 2"
-  gem.add_dependency "ruby-statistics", ">= 2.1"
+  gem.add_dependency "ruby-statistics", ">= 4.0"
   gem.add_dependency "mini_histogram",  ">= 0.3.0"
   gem.add_dependency "dead_end",        ">= 0"
   gem.add_dependency "rack-test",       ">= 0"
diff --git a/lib/derailed_benchmarks/stats_from_dir.rb b/lib/derailed_benchmarks/stats_from_dir.rb
index 5c107e3..5900535 100644
--- a/lib/derailed_benchmarks/stats_from_dir.rb
+++ b/lib/derailed_benchmarks/stats_from_dir.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 require 'bigdecimal'
-require 'statistics'
+require 'ruby-statistics'
 require 'stringio'
 require 'mini_histogram'
 require 'mini_histogram/plot'