diff --git a/autoload/denops_shared_server.vim b/autoload/denops_shared_server.vim
index cfa409d..97861ff 100644
--- a/autoload/denops_shared_server.vim
+++ b/autoload/denops_shared_server.vim
@@ -1,12 +1,12 @@
 function! denops_shared_server#install() abort
   if !exists('g:denops_server_addr')
-    call denops#util#error('No denops shared server address (g:denops_server_addr) is given.')
+    call denops_shared_server#util#error('No denops shared server address (g:denops_server_addr) is given.')
     return
   endif
   let [hostname, port] = s:parse_server_addr(g:denops_server_addr)
   let options = {
         \ 'deno': exepath(g:denops#deno),
-        \ 'script': denops#util#script_path('@denops-private/cli.ts'),
+        \ 'script': denops_shared_server#util#script_path('@denops-private/cli.ts'),
         \ 'hostname': hostname,
         \ 'port': port,
         \}
@@ -17,14 +17,14 @@ function! denops_shared_server#install() abort
   elseif executable('systemctl')
     call denops_shared_server#systemctl#install(options)
   else
-    call denops#util#error('This platform is not supported. Please configure denops-shared-server manually.')
+    call denops_shared_server#util#error('This platform is not supported. Please configure denops-shared-server manually.')
     return
   endif
-  call denops#util#info('wait 5 second for the shared server startup...')
+  call denops_shared_server#util#info('wait 5 second for the shared server startup...')
   sleep 5
-  call denops#util#info('connect to the shared server')
+  call denops_shared_server#util#info('connect to the shared server')
   call denops#server#connect()
-  call denops#util#info('stop the local server')
+  call denops_shared_server#util#info('stop the local server')
   call denops#server#stop()
 endfunction
 
@@ -36,7 +36,7 @@ function! denops_shared_server#uninstall() abort
   elseif executable('systemctl')
     call denops_shared_server#systemctl#uninstall()
   else
-    call denops#util#error('This platform is not supported. Please configure denops-shared-server manually.')
+    call denops_shared_server#util#error('This platform is not supported. Please configure denops-shared-server manually.')
     return
   endif
 endfunction
diff --git a/autoload/denops_shared_server/launchctl.vim b/autoload/denops_shared_server/launchctl.vim
index 85b8c3e..72028df 100644
--- a/autoload/denops_shared_server/launchctl.vim
+++ b/autoload/denops_shared_server/launchctl.vim
@@ -14,21 +14,21 @@ function! denops_shared_server#launchctl#install(options) abort
         \ 'deno_args': join(map(copy(g:denops#server#deno_args),
         \   { _, val -> printf('<string>%s</string>', val) }), "\n"),
         \})
-  call denops#util#info(printf('create the plist `%s`', s:plist_file))
+  call denops_shared_server#util#info(printf('create the plist `%s`', s:plist_file))
   call mkdir(fnamemodify(s:plist_file, ':h'), 'p')
   call writefile(content, s:plist_file, 'b')
 
-  call denops#util#info(printf('unload the plist `%s`', s:plist_file))
+  call denops_shared_server#util#info(printf('unload the plist `%s`', s:plist_file))
   call system(printf('launchctl unload %s', s:plist_file))
 
-  call denops#util#info(printf('load the plist `%s`', s:plist_file))
+  call denops_shared_server#util#info(printf('load the plist `%s`', s:plist_file))
   echo system(printf('launchctl load -w %s', s:plist_file))
 endfunction
 
 function! denops_shared_server#launchctl#uninstall() abort
-  call denops#util#info(printf('unload the plist `%s`', s:plist_file))
+  call denops_shared_server#util#info(printf('unload the plist `%s`', s:plist_file))
   echo system(printf('launchctl unload %s', s:plist_file))
 
-  call denops#util#info(printf('delete the plist `%s`', s:plist_file))
+  call denops_shared_server#util#info(printf('delete the plist `%s`', s:plist_file))
   call delete(s:plist_file)
 endfunction
diff --git a/autoload/denops_shared_server/runtray.vim b/autoload/denops_shared_server/runtray.vim
index 5b15efb..af29c78 100644
--- a/autoload/denops_shared_server/runtray.vim
+++ b/autoload/denops_shared_server/runtray.vim
@@ -15,29 +15,29 @@ function! denops_shared_server#runtray#install(options) abort
         \ 'port': a:options.port,
         \ 'deno_args': json_encode(g:denops#server#deno_args)[2:-3],
         \})
-  call denops#util#info(printf('create the configuration file `%s`', s:config_file))
+  call denops_shared_server#util#info(printf('create the configuration file `%s`', s:config_file))
   call mkdir(fnamemodify(s:config_file, ':h'), 'p')
   call writefile(content, s:config_file, 'b')
 
-  call denops#util#info(printf('download the script `%s`', s:script_file))
+  call denops_shared_server#util#info(printf('download the script `%s`', s:script_file))
   call denops_shared_server#runtray#_download_file(s:script_download_url, s:script_file)
   call denops_shared_server#runtray#_remove_zone_identifier(s:script_file)
 
-  call denops#util#info('install to the startup')
+  call denops_shared_server#util#info('install to the startup')
   call denops_shared_server#runtray#_execute_script_command('install')
 
-  call denops#util#info('start the service')
+  call denops_shared_server#util#info('start the service')
   call denops_shared_server#runtray#_execute_script_command('start')
 endfunction
 
 function! denops_shared_server#runtray#uninstall() abort
-  call denops#util#info('uninstall from the startup')
+  call denops_shared_server#util#info('uninstall from the startup')
   call denops_shared_server#runtray#_execute_script_command('uninstall')
 
-  call denops#util#info(printf('delete the configuration file `%s`', s:config_file))
+  call denops_shared_server#util#info(printf('delete the configuration file `%s`', s:config_file))
   call delete(s:config_file)
 
-  call denops#util#info(printf('delete the script `%s`', s:script_file))
+  call denops_shared_server#util#info(printf('delete the script `%s`', s:script_file))
   call delete(s:script_file)
 endfunction
 
diff --git a/autoload/denops_shared_server/systemctl.vim b/autoload/denops_shared_server/systemctl.vim
index 742fffe..46f7871 100644
--- a/autoload/denops_shared_server/systemctl.vim
+++ b/autoload/denops_shared_server/systemctl.vim
@@ -11,30 +11,30 @@ function! denops_shared_server#systemctl#install(options) abort
         \ 'port': a:options.port,
         \ 'deno_args': join(g:denops#server#deno_args, ' '),
         \})
-  call denops#util#info(printf('create the unit file `%s`', s:unit_file))
+  call denops_shared_server#util#info(printf('create the unit file `%s`', s:unit_file))
   call mkdir(fnamemodify(s:unit_file, ':h'), 'p')
   call writefile(content, s:unit_file, 'b')
 
-  call denops#util#info(printf('enable the unit `%s`', s:name))
+  call denops_shared_server#util#info(printf('enable the unit `%s`', s:name))
   echo system(printf('systemctl --user enable %s.service', s:name))
 
-  call denops#util#info(printf('start the unit `%s`', s:name))
+  call denops_shared_server#util#info(printf('start the unit `%s`', s:name))
   echo system(printf('systemctl --user start %s.service', s:name))
 endfunction
 
 function! denops_shared_server#systemctl#uninstall() abort
-  call denops#util#info(printf('stop the unit `%s`', s:name))
+  call denops_shared_server#util#info(printf('stop the unit `%s`', s:name))
   echo system(printf('systemctl --user stop %s.service', s:name))
 
-  call denops#util#info(printf('disable the unit `%s`', s:name))
+  call denops_shared_server#util#info(printf('disable the unit `%s`', s:name))
   echo system(printf('systemctl --user disable %s.service', s:name))
 
-  call denops#util#info(printf('delete the unit file `%s`', s:unit_file))
+  call denops_shared_server#util#info(printf('delete the unit file `%s`', s:unit_file))
   call delete(s:unit_file)
 
-  call denops#util#info('daemon reload')
+  call denops_shared_server#util#info('daemon reload')
   echo system('systemctl --user daemon-reload')
 
-  call denops#util#info('reset failed')
+  call denops_shared_server#util#info('reset failed')
   echo system('systemctl --user reset-failed')
 endfunction
diff --git a/autoload/denops_shared_server/util.vim b/autoload/denops_shared_server/util.vim
new file mode 100644
index 0000000..5b00447
--- /dev/null
+++ b/autoload/denops_shared_server/util.vim
@@ -0,0 +1,25 @@
+function! denops_shared_server#util#script_path(path) abort
+  try
+    " Denops v4 or later
+    return denops#_internal#path#script([a:path])
+  catch /^Vim\%((\a\+)\)\=:E117:/
+    " Denops v3 or prior
+    return denops#util#script_path(a:path)
+  endtry
+endfunction
+
+function! denops_shared_server#util#info(...) abort
+  call s:echomsg('None', a:000)
+endfunction
+
+function! denops_shared_server#util#error(...) abort
+  call s:echomsg('ErrorMsg', a:000)
+endfunction
+
+function! s:echomsg(hl, msg) abort
+  execute printf('echohl %s', a:hl)
+  for l:line in split(join(a:msg), '\n')
+    echomsg printf('[denops-shared-server] %s', l:line)
+  endfor
+  echohl None
+endfunction