diff --git a/Gemfile b/Gemfile
index 99d6ed5..0b61a9e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,15 @@
 source 'https://rubygems.org'
 
+gemspec
+
 gem "net-ftp" if Gem::Requirement.new("> 3.1.0.dev").satisfied_by?(Gem::Version.new(RUBY_VERSION))
 
-# Specify your gem's dependencies in mini_portile2.gemspec
-gemspec
+gem "minitar", "0.9"
+gem "minitest", "~> 5.15" # open range for ruby 2.3 support
+gem "minitest-hooks", "1.5.1"
+gem "rake", "13.2.1"
+if RUBY_VERSION >= "3.4"
+  gem "webrick", git: "https://github.com/ruby/webrick" # shouldn't be necessary to pin once webrick 1.8.2 or 1.9.0 is released
+else
+  gem "webrick"
+end
diff --git a/mini_portile2.gemspec b/mini_portile2.gemspec
index 64619cd..b2dd49d 100644
--- a/mini_portile2.gemspec
+++ b/mini_portile2.gemspec
@@ -34,12 +34,5 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = ">= 2.3.0"
 
-  spec.add_development_dependency "bundler", "~> 2.2"
-  spec.add_development_dependency "minitar", "~> 0.9"
-  spec.add_development_dependency "minitest", "~> 5.15"
-  spec.add_development_dependency "minitest-hooks", "~> 1.5"
-  spec.add_development_dependency "rake", "~> 13.0"
-  spec.add_development_dependency "webrick", "~> 1.7"
-
   spec.metadata["changelog_uri"] = spec.homepage + "/blob/main/CHANGELOG.md"
 end