--- a/runtime/syntax/wget.vim
+++ b/runtime/syntax/wget.vim
@@ -1,7 +1,9 @@
 " Vim syntax file
 " Language:     Wget configuration file (/etc/wgetrc ~/.wgetrc)
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2013 Jun 1
+" Last Change:	2022 Apr 28
+
+" GNU Wget 1.21 built on linux-gnu.
 
 if exists("b:current_syntax")
   finish
@@ -18,155 +20,206 @@ syn region wgetString start=+"+ skip=+\\
 syn region wgetString start=+'+ skip=+\\\\\|\\'+ end=+'+ contained oneline
 
 syn case ignore
-syn keyword wgetBoolean on off contained
-syn keyword wgetNumber  inf    contained
-syn case match
+
+syn keyword wgetBoolean on off yes no contained
+syn keyword wgetNumber	inf	      contained
 
-syn match wgetNumber "\<\%(\d\+\|inf\)\>" contained
-syn match wgetQuota  "\<\d\+[kKmM]\>"     contained
-syn match wgetTime   "\<\d\+[smhdw]\>"    contained
+syn match wgetNumber "\<\d\+>"		  contained
+syn match wgetQuota  "\<\d\+[kmgt]\>"	  contained
+syn match wgetTime   "\<\d\+[smhdw]\>"	  contained
 
 "{{{ Commands
-let s:commands = map([
-        \ "accept",
-	\ "add_hostdir",
-	\ "adjust_extension",
-	\ "always_rest",
-	\ "ask_password",
-	\ "auth_no_challenge",
-	\ "background",
-	\ "backup_converted",
-	\ "backups",
-	\ "base",
-	\ "bind_address",
-	\ "ca_certificate",
-	\ "ca_directory",
-	\ "cache",
-	\ "certificate",
-	\ "certificate_type",
-	\ "check_certificate",
-	\ "connect_timeout",
-	\ "content_disposition",
-	\ "continue",
-	\ "convert_links",
-	\ "cookies",
-	\ "cut_dirs",
-	\ "debug",
-	\ "default_page",
-	\ "delete_after",
-	\ "dns_cache",
-	\ "dns_timeout",
-	\ "dir_prefix",
-	\ "dir_struct",
-	\ "domains",
-	\ "dot_bytes",
-	\ "dots_in_line",
-	\ "dot_spacing",
-	\ "dot_style",
-	\ "egd_file",
-	\ "exclude_directories",
-	\ "exclude_domains",
-	\ "follow_ftp",
-	\ "follow_tags",
-	\ "force_html",
-	\ "ftp_passwd",
-	\ "ftp_password",
-	\ "ftp_user",
-	\ "ftp_proxy",
-	\ "glob",
-	\ "header",
-	\ "html_extension",
-	\ "htmlify",
-	\ "http_keep_alive",
-	\ "http_passwd",
-	\ "http_password",
-	\ "http_proxy",
-	\ "https_proxy",
-	\ "http_user",
-	\ "ignore_case",
-	\ "ignore_length",
-	\ "ignore_tags",
-	\ "include_directories",
-	\ "inet4_only",
-	\ "inet6_only",
-	\ "input",
-	\ "iri",
-	\ "keep_session_cookies",
-	\ "kill_longer",
-	\ "limit_rate",
-	\ "load_cookies",
-	\ "locale",
-	\ "local_encoding",
-	\ "logfile",
-	\ "login",
-	\ "max_redirect",
-	\ "mirror",
-	\ "netrc",
-	\ "no_clobber",
-	\ "no_parent",
-	\ "no_proxy",
-	\ "numtries",
-	\ "output_document",
-	\ "page_requisites",
-	\ "passive_ftp",
-	\ "passwd",
-	\ "password",
-	\ "post_data",
-	\ "post_file",
-	\ "prefer_family",
-	\ "preserve_permissions",
-	\ "private_key",
-	\ "private_key_type",
-	\ "progress",
-	\ "protocol_directories",
-	\ "proxy_passwd",
-	\ "proxy_password",
-	\ "proxy_user",
-	\ "quiet",
-	\ "quota",
-	\ "random_file",
-	\ "random_wait",
-	\ "read_timeout",
-	\ "reclevel",
-	\ "recursive",
-	\ "referer",
-	\ "reject",
-	\ "relative_only",
-	\ "remote_encoding",
-	\ "remove_listing",
-	\ "restrict_file_names",
-	\ "retr_symlinks",
-	\ "retry_connrefused",
-	\ "robots",
-	\ "save_cookies",
-	\ "save_headers",
-	\ "secure_protocol",
-	\ "server_response",
-	\ "show_all_dns_entries",
-	\ "simple_host_check",
-	\ "span_hosts",
-	\ "spider",
-	\ "strict_comments",
-	\ "sslcertfile",
-	\ "sslcertkey",
-	\ "timeout",
-	\ "time_stamping",
-	\ "use_server_timestamps",
-	\ "tries",
-	\ "trust_server_names",
-	\ "user",
-	\ "use_proxy",
-	\ "user_agent",
-	\ "verbose",
-	\ "wait",
-	\ "wait_retry"],
-	\ "substitute(v:val, '_', '[-_]\\\\=', 'g')")
+let s:commands =<< trim EOL
+  accept
+  accept_regex
+  add_host_dir
+  adjust_extension
+  always_rest
+  ask_password
+  auth_no_challenge
+  background
+  backup_converted
+  backups
+  base
+  bind_address
+  bind_dns_address
+  body_data
+  body_file
+  ca_certificate
+  ca_directory
+  cache
+  certificate
+  certificate_type
+  check_certificate
+  choose_config
+  ciphers
+  compression
+  connect_timeout
+  content_disposition
+  content_on_error
+  continue
+  convert_file_only
+  convert_links
+  cookies
+  crl_file
+  cut_dirs
+  debug
+  default_page
+  delete_after
+  dns_cache
+  dns_servers
+  dns_timeout
+  dir_prefix
+  dir_struct
+  domains
+  dot_bytes
+  dots_in_line
+  dot_spacing
+  dot_style
+  egd_file
+  exclude_directories
+  exclude_domains
+  follow_ftp
+  follow_tags
+  force_html
+  ftp_passwd
+  ftp_password
+  ftp_user
+  ftp_proxy
+  ftps_clear_data_connection
+  ftps_fallback_to_ftp
+  ftps_implicit
+  ftps_resume_ssl
+  hsts
+  hsts_file
+  ftp_stmlf
+  glob
+  header
+  html_extension
+  htmlify
+  http_keep_alive
+  http_passwd
+  http_password
+  http_proxy
+  https_proxy
+  https_only
+  http_user
+  if_modified_since
+  ignore_case
+  ignore_length
+  ignore_tags
+  include_directories
+  inet4_only
+  inet6_only
+  input
+  input_meta_link
+  iri
+  keep_bad_hash
+  keep_session_cookies
+  kill_longer
+  limit_rate
+  load_cookies
+  locale
+  local_encoding
+  logfile
+  login
+  max_redirect
+  metalink_index
+  metalink_over_http
+  method
+  mirror
+  netrc
+  no_clobber
+  no_config
+  no_parent
+  no_proxy
+  numtries
+  output_document
+  page_requisites
+  passive_ftp
+  passwd
+  password
+  pinned_pubkey
+  post_data
+  post_file
+  prefer_family
+  preferred_location
+  preserve_permissions
+  private_key
+  private_key_type
+  progress
+  protocol_directories
+  proxy_passwd
+  proxy_password
+  proxy_user
+  quiet
+  quota
+  random_file
+  random_wait
+  read_timeout
+  rec_level
+  recursive
+  referer
+  regex_type
+  reject
+  rejected_log
+  reject_regex
+  relative_only
+  remote_encoding
+  remove_listing
+  report_speed
+  restrict_file_names
+  retr_symlinks
+  retry_connrefused
+  retry_on_host_error
+  retry_on_http_error
+  robots
+  save_cookies
+  save_headers
+  secure_protocol
+  server_response
+  show_all_dns_entries
+  show_progress
+  simple_host_check
+  span_hosts
+  spider
+  start_pos
+  strict_comments
+  sslcertfile
+  sslcertkey
+  timeout
+  timestamping
+  use_server_timestamps
+  tries
+  trust_server_names
+  unlink
+  use_askpass
+  user
+  use_proxy
+  user_agent
+  verbose
+  wait
+  wait_retry
+  warc_cdx
+  warc_cdx_dedup
+  warc_compression
+  warc_digests
+  warc_file
+  warc_header
+  warc_keep_log
+  warc_max_size
+  warc_temp_dir
+  wdebug
+  xattr
+EOL
 "}}}
 
-syn case ignore
+call map(s:commands, "substitute(v:val, '_', '[-_]\\\\=', 'g')")
+
 for cmd in s:commands
-  exe 'syn match wgetCommand "' . cmd . '" nextgroup=wgetAssignmentOperator skipwhite contained'
+  exe 'syn match wgetCommand "\<' . cmd . '\>" nextgroup=wgetAssignmentOperator skipwhite contained'
 endfor
+
 syn case match
 
 syn match wgetStart "^" nextgroup=wgetCommand,wgetComment skipwhite
@@ -179,6 +232,7 @@ hi def link wgetComment		   Comment
 hi def link wgetNumber		   Number
 hi def link wgetQuota		   Number
 hi def link wgetString		   String
+hi def link wgetTime		   Number
 hi def link wgetTodo		   Todo
 
 let b:current_syntax = "wget"