diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index 0532a48..0d30a2d 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -3,7 +3,7 @@
 " Maintainer:	Hirohito Higashi <h.east.727 ATMARK gmail.com>
 " 	Doug Kearns <dougkearns@gmail.com>
 " URL:	https://github.com/vim-jp/syntax-vim-ex
-" Last Change:	Feb 27, 2024
+" Last Change:	Mar 02, 2024
 " Former Maintainer: Charles E. Campbell
 " Base File URL:     http://www.drchip.org/astronaut/vim/index.html#SYNTAX_VIM
 " Base File Version: 9.0-25
@@ -204,7 +204,8 @@
 syn match vimNumber	'0[bB][01]\+'		       skipwhite nextgroup=vimGlobal,vimSubst1,vimCommand,vimComment,vim9Comment
 
 " All vimCommands are contained by vimIsCommand. {{{2
-syn match vimCmdSep	"[:|]\+"	skipwhite nextgroup=vimAbb,vimAddress,vimAutoCmd,vimAugroup,vimBehave,vimEcho,vimEchoHL,vimExecute,vimIsCommand,vimExtCmd,vimFilter,vimGlobal,vimHighlight,vimLet,vimMap,vimMark,vimNorm,vimSet,vimSubst1,vimSyntax,vimUnlet,vimUnmap,vimUserCmd
+syn cluster vimCmdList	contains=vimAbb,vimAddress,vimAutoCmd,vimAugroup,vimBehave,vimEcho,vimEchoHL,vimExecute,vimIsCommand,vimExtCmd,vimFunction,vimGlobal,vimHighlight,vimLet,vimMap,vimMark,vimNotFunc,vimNorm,vimSet,vimSyntax,vimUnlet,vimUnmap,vimUserCmd
+syn match vimCmdSep	"[:|]\+"	skipwhite nextgroup=@vimCmdList,vimSubst1
 syn match vimIsCommand	"\<\%(\h\w*\|[23]mat\%[ch]\)\>"	contains=vimCommand
 syn match vimVar	      contained	"\<\h[a-zA-Z0-9#_]*\>"
 syn match vimVar		"\<[bwglstav]:\h[a-zA-Z0-9#_]*\>"
@@ -245,17 +246,21 @@
 
 " Augroup : vimAugroupError removed because long augroups caused sync'ing problems. {{{2
 " ======= : Trade-off: Increasing synclines with slower editing vs augroup END error checking.
-syn cluster vimAugroupList	contains=vimAugroup,vimIsCommand,vimUserCmd,vimExecute,vimNotFunc,vimFuncName,vimFunction,vimFunctionError,vimLineComment,vimNotFunc,vimMap,vimSpecFile,vimOper,vimNumber,vimOperParen,vimComment,vim9Comment,vimString,vimSubst,vimMark,vimRegister,vimAddress,vimFilter,vimCmplxRepeat,vimComment,vim9Comment,vimLet,vimSet,vimAutoCmd,vimRegion,vimSynLine,vimNotation,vimCtrlChar,vimFuncVar,vimContinue,vimOption
+syn cluster vimAugroupList	contains=@vimCmdList,vimFilter,vimFunc,vimFunctionError,vimLineComment,vimSpecFile,vimOper,vimNumber,vimOperParen,vimComment,vim9Comment,vimString,vimSubst,vimRegister,vimCmplxRepeat,vimRegion,vimSynLine,vimNotation,vimCtrlChar,vimFuncVar,vimContinue
+syn match   vimAugroup	"\<aug\%[roup]\>" contains=vimAugroupKey,vimAugroupBang skipwhite nextgroup=vimAugroupBang,vimAutoCmdGroup
 if exists("g:vimsyn_folding") && g:vimsyn_folding =~# 'a'
- syn region  vimAugroup	fold matchgroup=vimAugroupKey start="\<aug\%[roup]\>\ze\s\+\K\k*" end="\<aug\%[roup]\>\ze\s\+[eE][nN][dD]\>"	contains=vimAutoCmd,@vimAugroupList
+  syn region  vimAugroup  fold	start="\<aug\%[roup]\>\ze\s\+\%([eE][nN][dD]\)\@!\S\+" matchgroup=vimAugroupKey end="\<aug\%[roup]\>\ze\s\+[eE][nN][dD]\>" contains=vimAutoCmd,@vimAugroupList,vimAugroupkey skipwhite nextgroup=vimAugroupEnd
 else
- syn region  vimAugroup	matchgroup=vimAugroupKey start="\<aug\%[roup]\>\ze\s\+\K\k*" end="\<aug\%[roup]\>\ze\s\+[eE][nN][dD]\>"		contains=vimAutoCmd,@vimAugroupList
+  syn region  vimAugroup	start="\<aug\%[roup]\>\ze\s\+\%([eE][nN][dD]\)\@!\S\+" matchgroup=vimAugroupKey end="\<aug\%[roup]\>\ze\s\+[eE][nN][dD]\>" contains=vimAutoCmd,@vimAugroupList,vimAugroupkey skipwhite nextgroup=vimAugroupEnd
 endif
-syn match   vimAugroup	"aug\%[roup]!"	contains=vimAugroupKey
 if !exists("g:vimsyn_noerror") && !exists("g:vimsyn_noaugrouperror")
- syn match   vimAugroupError	"\<aug\%[roup]\>\s\+[eE][nN][dD]\>"
+  syn match   vimAugroupError	"\<aug\%[roup]\>\s\+[eE][nN][dD]\>"
 endif
-syn keyword vimAugroupKey contained	aug[roup]
+
+syn match   vimAutoCmdGroup	contained "\S\+"
+syn match   vimAugroupEnd	contained "\c\<END\>"
+syn match   vimAugroupBang	contained "\a\@1<=!" skipwhite nextgroup=vimAutoCmdGroup
+syn keyword vimAugroupKey	contained aug[roup]  skipwhite nextgroup=vimAugroupBang,vimAutoCmdGroup,vimAugroupEnd
 
 " Operators: {{{2
 " =========
@@ -272,7 +277,7 @@
 " Functions : Tag is provided for those who wish to highlight tagged functions {{{2
 " =========
 syn cluster	vimFuncList	contains=vimCommand,vimFunctionError,vimFuncKey,Tag,vimFuncSID
-syn cluster	vimFuncBodyList	contains=vimAbb,vimAddress,vimAugroupKey,vimAutoCmd,vimCmplxRepeat,vimComment,vim9Comment,vimContinue,vimCtrlChar,vimEcho,vimEchoHL,vimEnvvar,vimExecute,vimIsCommand,vimFBVar,vimFunc,vimFunction,vimFuncVar,vimGlobal,vimHighlight,vimIsCommand,vimLet,vimLetHereDoc,vimLineComment,vimMap,vimMark,vimNorm,vimNotation,vimNotFunc,vimNumber,vimOper,vimOperParen,vimRegion,vimRegister,vimSearch,vimSet,vimSpecFile,vimString,vimSubst,vimSynLine,vimUnmap,vimUserCommand
+syn cluster	vimFuncBodyList	contains=@vimCmdList,vimCmplxRepeat,vimComment,vim9Comment,vimContinue,vimCtrlChar,vimEnvvar,vimFBVar,vimFunc,vimFunction,vimFuncVar,vimLetHereDoc,vimLineComment,vimNotation,vimNotFunc,vimNumber,vimOper,vimOperParen,vimRegion,vimRegister,vimSearch,vimSpecFile,vimString,vimSubst,vimSynLine
 syn match	vimFunction	"\<\(fu\%[nction]\)!\=\s\+\%(<[sS][iI][dD]>\|[sSgGbBwWtTlL]:\)\=\%(\i\|[#.]\|{.\{-1,}}\)*\ze\s*("	contains=@vimFuncList nextgroup=vimFuncBody
 syn match	vimFunction	"\<def\s\+new\i\{-}(" contains=@vimFuncList nextgroup=vimFuncBody
 syn match	vimFunction	"\<def!\=\s\+\%(\i\|[#.]\|{.\{-1,}}\)*\ze\s*(" contains=@vimFuncList nextgroup=vimFuncBody
@@ -319,7 +324,7 @@
 
 " User-Specified Commands: {{{2
 " =======================
-syn cluster	vimUserCmdList	contains=vimAddress,vimSyntax,vimHighlight,vimAutoCmd,vimCmplxRepeat,vimComment,vim9Comment,vimCtrlChar,vimEscapeBrace,vimFunc,vimFuncName,vimFunction,vimFunctionError,vimIsCommand,vimMark,vimNotation,vimNumber,vimOper,vimRegion,vimRegister,vimLet,vimSet,vimSetEqual,vimSetString,vimSpecFile,vimString,vimSubst,vimSubstRep,vimSubstRange,vimSynLine
+syn cluster	vimUserCmdList	contains=@vimCmdList,vimCmplxRepeat,vimComment,vim9Comment,vimCtrlChar,vimEscapeBrace,vimFunc,vimFunctionError,vimNotation,vimNumber,vimOper,vimRegion,vimRegister,vimSpecFile,vimString,vimSubst,vimSubstRep,vimSubstRange,vimSynLine
 syn keyword	vimUserCommand	contained	com[mand]
 syn match	vimUserCmd	"\<com\%[mand]!\=\>.*$"	contains=vimUserAttrb,vimUserAttrbError,vimUserCommand,@vimUserCmdList,vimComFilter
 syn match	vimUserAttrbError	contained	"-\a\+\ze\s"
@@ -975,6 +980,7 @@
 
  hi def link vimAbb	vimCommand
  hi def link vimAddress	vimMark
+ hi def link vimAugroupBang	vimBang
  hi def link vimAugroupError	vimError
  hi def link vimAugroupKey	vimCommand
  hi def link vimAuHighlight	vimHighlight