diff --git a/derailed_benchmarks.gemspec b/derailed_benchmarks.gemspec
index 592d7ff..bbd5db8 100644
--- a/derailed_benchmarks.gemspec
+++ b/derailed_benchmarks.gemspec
@@ -34,8 +34,10 @@ Gem::Specification.new do |gem|
   else
     gem.add_dependency "ruby-statistics", ">= 2.1"
   end
+  if RUBY_VERSION < "3.2"
+    gem.add_dependency "syntax_suggest", "~> 1.1.0"
+  end
   gem.add_dependency "mini_histogram",  ">= 0.3.0"
-  gem.add_dependency "dead_end",        ">= 0"
   gem.add_dependency "rack-test",       ">= 0"
   gem.add_dependency "base64",          ">= 0"
   gem.add_dependency "mutex_m",         ">= 0"
diff --git a/lib/derailed_benchmarks.rb b/lib/derailed_benchmarks.rb
index 2f1e379..bf76ffb 100644
--- a/lib/derailed_benchmarks.rb
+++ b/lib/derailed_benchmarks.rb
@@ -4,8 +4,6 @@
 require 'bundler'
 require 'get_process_mem'
 
-require 'dead_end'
-
 module DerailedBenchmarks
   def self.gem_is_bundled?(name)
     specs = ::Bundler.locked_gems.specs.each_with_object({}) {|spec, hash| hash[spec.name] = spec }