diff --git a/Gemfile.lock b/Gemfile.lock
index 160a5bcb..b5f099cf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,6 +4,7 @@ PATH
     packwerk (3.2.3)
       activesupport (>= 6.0)
       ast
+      benchmark
       better_html
       bundler
       constant_resolver (>= 0.3)
diff --git a/packwerk.gemspec b/packwerk.gemspec
index 82e0c10b..9a682ca3 100644
--- a/packwerk.gemspec
+++ b/packwerk.gemspec
@@ -39,6 +39,7 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = ">= 3.1"
 
   spec.add_dependency("activesupport", ">= 6.0")
+  spec.add_dependency("benchmark")
   spec.add_dependency("bundler")
   spec.add_dependency("constant_resolver", ">= 0.3")
   spec.add_dependency("parallel")