diff --git a/Gemfile b/Gemfile
index d2fceab..f5a62b3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,10 @@
 source "https://rubygems.org"
 
-git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
-
 gemspec
+
+gem "webrick", "~> 1.7"
+gem "minitest", "~> 5.7"
+gem "rdoc", "< 7", ">= 4.0"
+gem "builder", "~> 3.2"
+gem "rubygems-generate_index"
+gem "rake"
diff --git a/rubygems-mirror.gemspec b/rubygems-mirror.gemspec
index aa902f1..d07aaa5 100644
--- a/rubygems-mirror.gemspec
+++ b/rubygems-mirror.gemspec
@@ -21,10 +21,4 @@ Gem::Specification.new do |s|
   s.specification_version = 4
 
   s.add_runtime_dependency(%q<net-http-persistent>.freeze, ["~> 2.9"])
-  s.add_development_dependency(%q<webrick>.freeze, ["~> 1.7"])
-  s.add_development_dependency(%q<minitest>.freeze, ["~> 5.7"])
-  s.add_development_dependency(%q<rdoc>.freeze, ["< 7", ">= 4.0"])
-  s.add_development_dependency(%q<builder>.freeze, ["~> 3.2"])
-  s.add_development_dependency(%q<rubygems-generate_index>.freeze)
-  s.add_development_dependency(%q<rake>.freeze)
 end