- ruby-addressable (>= 2.8)
- ruby-domain-name (>= 0.5.20190701)
- ruby-http-cookie (>= 1.0.3)
- ruby-mime-types (>= 3.0)
- ruby-net-http-digest-auth (>= 1.4.1)
- ruby-net-http-persistent (>= 2.5.2)
- ruby-net-http-persistent (<< 5.0.dev)
- ruby-nokogiri (>= 1.11.2)
- ruby-webrick (>= 1.7)
- ruby-webrobots (>= 0.1.2)
- ruby-ntlm (>= 0.6.3)
- ruby-base64
- ruby-nkf