diff --git a/lib/net/ftp.rb b/lib/net/ftp.rb
index 1f6879d765..307b40e6dd 100644
--- a/lib/net/ftp.rb
+++ b/lib/net/ftp.rb
@@ -17,7 +17,7 @@
 
 require "socket"
 require "monitor"
-require_relative "protocol"
+require "net/protocol"
 require "time"
 begin
   require "openssl"
diff --git a/lib/net/ftp/net-ftp.gemspec b/lib/net/ftp/net-ftp.gemspec
new file mode 100644
index 0000000000..2aae0b23ea
--- /dev/null
+++ b/lib/net/ftp/net-ftp.gemspec
@@ -0,0 +1,29 @@
+begin
+  require_relative 'lib/net/ftp/version'
+rescue LoadError # Fallback to load version file in ruby core repository
+  require_relative "version"
+end
+
+Gem::Specification.new do |spec|
+  spec.name          = "net-ftp"
+  spec.version       = Net::Ftp::VERSION
+  spec.authors       = ["Hiroshi SHIBATA"]
+  spec.email         = ["hsbt@ruby-lang.org"]
+
+  spec.summary       = %q{Support for the File Transfer Protocol.}
+  spec.description   = %q{Support for the File Transfer Protocol.}
+  spec.homepage      = "https://github.com/ruby/net-ftp"
+  spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
+
+  spec.metadata["homepage_uri"] = spec.homepage
+  spec.metadata["source_code_uri"] = spec.homepage
+
+  # Specify which files should be added to the gem when it is released.
+  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
+  spec.files         = Dir.chdir(File.expand_path('..', __FILE__)) do
+    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  end
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+end
diff --git a/lib/net/ftp/version.rb b/lib/net/ftp/version.rb
new file mode 100644
index 0000000000..865bf44111
--- /dev/null
+++ b/lib/net/ftp/version.rb
@@ -0,0 +1,5 @@
+module Net
+  module Ftp
+    VERSION = "0.1.0"
+  end
+end
diff --git a/tool/sync_default_gems.rb b/tool/sync_default_gems.rb
index db0db12e80..6d374a19e3 100644
--- a/tool/sync_default_gems.rb
+++ b/tool/sync_default_gems.rb
@@ -61,6 +61,7 @@
 # * https://github.com/ruby/English
 # * https://github.com/ruby/net-protocol
 # * https://github.com/ruby/net-imap
+# * https://github.com/ruby/net-ftp
 #
 
 require 'fileutils'
@@ -120,6 +121,7 @@ $repositories = {
   English: "ruby/English",
   "net-protocol": "ruby/net-protocol",
   "net-imap": "ruby/net-imap",
+  "net-ftp": "ruby/net-ftp",
 }
 
 def sync_default_gems(gem)
@@ -284,6 +286,9 @@ def sync_default_gems(gem)
   when "net-imap"
     sync_lib "net-imap"
     mv "lib/net-imap.gemspec", "lib/net/imap"
+  when "net-ftp"
+    sync_lib "net-ftp"
+    mv "lib/net-ftp.gemspec", "lib/net/ftp"
   when "readline-ext"
     rm_rf(%w[ext/readline test/readline])
     cp_r("#{upstream}/ext/readline", "ext")