diff --git a/lib/pry/command_set.rb b/lib/pry/command_set.rb
index fe0b1d22..f741964e 100644
--- a/lib/pry/command_set.rb
+++ b/lib/pry/command_set.rb
@@ -256,7 +256,7 @@ class Pry
       end
 
       command "install-command", "Install a disabled command." do |name|
-        require 'gem/dependency_installer' unless defined? Gem::DependencyInstaller
+        require 'rubygems/dependency_installer' unless defined? Gem::DependencyInstaller
         command = find_command(name)
         stub_info = command.options[:stub_info]
 
diff --git a/lib/pry/default_commands/gems.rb b/lib/pry/default_commands/gems.rb
index 58f860a1..6e093c0e 100644
--- a/lib/pry/default_commands/gems.rb
+++ b/lib/pry/default_commands/gems.rb
@@ -4,7 +4,7 @@ class Pry
     Gems = Pry::CommandSet.new do
 
       command "gem-install", "Install a gem and refresh the gem cache.", :argument_required => true do |gem|
-        require 'gem/dependency_installer' unless defined? Gem::DependencyInstaller
+        require 'rubygems/dependency_installer' unless defined? Gem::DependencyInstaller
         begin
           destination = File.writable?(Gem.dir) ? Gem.dir : Gem.user_dir
           installer = Gem::DependencyInstaller.new :install_dir => destination