diff --git a/runtime/syntax/pandoc.vim b/runtime/syntax/pandoc.vim
index 7928cc6..fdbdde0 100644
--- a/runtime/syntax/pandoc.vim
+++ b/runtime/syntax/pandoc.vim
@@ -1,18 +1,23 @@
 scriptencoding utf-8
-"
+" Vim syntax file
 " Language:	Pandoc (superset of Markdown)
 " Maintainer:	Felipe Morales <hel.sheep@gmail.com>
 " Maintainer:	Caleb Maclennan <caleb@alerque.com>
-" Upstream:	https://github.com/vim-pandoc/vim-pandoc-syntax
-"
+" Upstream:	https://github.com/vim-pandoc/vim-pandoc-syntax/tree/ea3fc415784bdcbae7f0093b80070ca4ff9e44c8
 " Contributor:	David Sanson <dsanson@gmail.com>
 "		Jorge Israel Peña <jorge.israel.p@gmail.com>
+"		Christian Brabandt @chrisbra
 " Original Author:	Jeremy Schultz <taozhyn@gmail.com>
 " Version: 5.0
 " Last Change:	2024 Apr 08
+" 2025 Jun 27 by Vim project: sync with upstream (#17598)
 
-let s:cpo_save = &cpo
-set cpo&vim
+if exists('b:current_syntax')
+  finish
+endif
+
+let s:cpo_save = &cpoptions
+set cpoptions&vim
 
 " Configuration: {{{1
 "
@@ -155,10 +160,10 @@
 " Functions: {{{1
 " EnableEmbedsforCodeblocksWithLang {{{2
 function! EnableEmbedsforCodeblocksWithLang(entry)
-    " prevent embedded language syntaxes from changing 'foldmethod' 
+    " prevent embedded language syntaxes from changing 'foldmethod'
     if has('folding')
         let s:foldmethod = &l:foldmethod
-        let s:foldtext = &l:foldtext     
+        let s:foldtext = &l:foldtext
     endif
 
     try
@@ -169,7 +174,7 @@
         " We might have just turned off spellchecking by including the file,
         " so we turn it back on here.
         exe 'syntax spell toplevel'
-        exe 'syn region pandocDelimitedCodeBlock_' . s:langname . ' start=/\(\_^\( \+\|\t\)\=\(`\{3,}`*\|\~\{3,}\~*\)\s*\%({[^.]*\.\)\=' . s:langname . '\>.*\n\)\@<=\_^/' .
+        exe 'syn region pandocDelimitedCodeBlock_' . s:langname . ' start=/\(\_^\( \+\|\t\)\=\(`\{3,}`*\|\~\{3,}\~*\)\s*\%({[^.]*[.=]\)\=' . s:langname . '\>.*\n\)\@<=\_^/' .
                     \' end=/\_$\n\(\( \+\|\t\)\=\(`\{3,}`*\|\~\{3,}\~*\)\_$\n\_$\)\@=/ contained containedin=pandocDelimitedCodeBlock' .
                     \' contains=@' . toupper(s:langname)
         exe 'syn region pandocDelimitedCodeBlockinBlockQuote_' . s:langname . ' start=/>\s\(`\{3,}`*\|\~\{3,}\~*\)\s*\%({[^.]*\.\)\=' . s:langname . '\>/' .
@@ -228,7 +233,7 @@
 
 " Embeds: {{{2
 
-" prevent embedded language syntaxes from changing 'foldmethod' 
+" prevent embedded language syntaxes from changing 'foldmethod'
 if has('folding')
     let s:foldmethod = &l:foldmethod
 endif
@@ -295,7 +300,7 @@
 " Links: {{{2
 
 " Base: {{{3
-syn region pandocReferenceLabel matchgroup=pandocOperator start=/!\{,1}\\\@<!\^\@<!\[/ skip=/\(\\\@<!\]\]\@=\|`.*\\\@<!].*`\)/ end=/\\\@<!\]/ keepend display
+syn region pandocReferenceLabel matchgroup=pandocOperator start=/!\{,1}\\\@<!\^\@<!\[/ skip=/\(\\\@<!\]\]\@=\|`[^`]*`\)/ end=/\\\@<!\]/ keepend display
 if g:pandoc#syntax#conceal#urls == 1
     syn region pandocReferenceURL matchgroup=pandocOperator start=/\]\@1<=(/ end=/)/ keepend conceal
 else
@@ -334,8 +339,8 @@
 " Text Styles: {{{2
 
 " Emphasis: {{{3
-call s:WithConceal('block', 'syn region pandocEmphasis matchgroup=pandocOperator start=/\\\@1<!\(\_^\|\s\|[[:punct:]]\)\@<=\*\S\@=/ skip=/\(\*\*\|__\)/ end=/\*\([[:punct:]]\|\s\|\_$\)\@=/ contains=@Spell,pandocNoFormattedInEmphasis,pandocLatexInlineMath,pandocAmpersandEscape', 'concealends')
-call s:WithConceal('block', 'syn region pandocEmphasis matchgroup=pandocOperator start=/\\\@1<!\(\_^\|\s\|[[:punct:]]\)\@<=_\S\@=/ skip=/\(\*\*\|__\)/ end=/\S\@1<=_\([[:punct:]]\|\s\|\_$\)\@=/ contains=@Spell,pandocNoFormattedInEmphasis,pandocLatexInlineMath,pandocAmpersandEscape', 'concealends')
+call s:WithConceal('block', 'syn region pandocEmphasis matchgroup=pandocOperator start=/\\\@1<!\(\_^\|\s\|[[:punct:]]\)\@<=\*\S\@=/ skip=/\(\*\*\|__\)/ end=/\*\([[:punct:]]\|\a\|\s\|\_$\)\@=/ contains=@Spell,pandocNoFormattedInEmphasis,pandocLatexInlineMath,pandocAmpersandEscape', 'concealends')
+call s:WithConceal('block', 'syn region pandocEmphasis matchgroup=pandocOperator start=/\\\@1<!\(\_^\|\s\|[[:punct:]]\)\@<=_\S\@=/ skip=/\(\*\*\|__\)/ end=/\S\@1<=_\([[:punct:]]\|\a\|\s\|\_$\)\@=/ contains=@Spell,pandocNoFormattedInEmphasis,pandocLatexInlineMath,pandocAmpersandEscape', 'concealends')
 " }}}3
 
 " Strong: {{{3
@@ -487,7 +492,7 @@
 call s:WithConceal('list', 'syn match pandocUListItemBullet /^>\=\s*\zs[*+-]/ contained containedin=pandocUListItem', 'conceal cchar='.s:cchars['li'])
 
 " Ordered lists
-syn match pandocListItem /^\s*(\?\(\d\+\|\l\|\#\|@\)[.)].*$/ nextgroup=pandocListItem,pandocLaTeXMathBlock,pandocLaTeXInlineMath,pandocEscapedDollar,pandocDelimitedCodeBlock,pandocListItemContinuation contains=@Spell,pandocEmphasis,pandocStrong,pandocNoFormatted,pandocStrikeout,pandocSubscript,pandocSuperscript,pandocStrongEmphasis,pandocStrongEmphasis,pandocPCite,pandocICite,pandocCiteKey,pandocReferenceLabel,pandocLaTeXCommand,pandocLaTeXMathBlock,pandocLaTeXInlineMath,pandocEscapedDollar,pandocAutomaticLink,pandocFootnoteDef,pandocFootnoteBlock,pandocFootnoteID,pandocAmpersandEscape skipempty display
+syn match pandocListItem /^\s*(\?\(\d\+\|\l\|\#\|@\)[.)].*$/ nextgroup=pandocListItem,pandocLaTeXMathBlock,pandocLaTeXInlineMath,pandocEscapedDollar,pandocDelimitedCodeBlock,pandocListItemContinuation contains=@Spell,pandocEmphasis,pandocStrong,pandocReferenceURL,pandocNoFormatted,pandocStrikeout,pandocSubscript,pandocSuperscript,pandocStrongEmphasis,pandocStrongEmphasis,pandocPCite,pandocICite,pandocCiteKey,pandocReferenceLabel,pandocLaTeXCommand,pandocLaTeXMathBlock,pandocLaTeXInlineMath,pandocEscapedDollar,pandocAutomaticLink,pandocFootnoteDef,pandocFootnoteBlock,pandocFootnoteID,pandocAmpersandEscape skipempty display
 
 " support for roman numerals up to 'c'
 if g:pandoc#syntax#roman_lists != 0
@@ -501,8 +506,8 @@
 
 " Definitions: {{{2
 if g:pandoc#syntax#use_definition_lists == 1
-    syn region pandocDefinitionBlock start=/^\%(\_^\s*\([`~]\)\1\{2,}\)\@!.*\n\(^\s*\n\)\=\s\{0,2}\([:~]\)\(\3\{2,}\3*\)\@!/ skip=/\n\n\zs\s/ end=/\n\n/ contains=pandocDefinitionBlockMark,pandocDefinitionBlockTerm,pandocCodeBlockInsideIndent,pandocEmphasis,pandocStrong,pandocStrongEmphasis,pandocNoFormatted,pandocStrikeout,pandocSubscript,pandocSuperscript,pandocFootnoteID,pandocReferenceURL,pandocReferenceLabel,pandocLaTeXMathBlock,pandocLaTeXInlineMath,pandocEscapedDollar,pandocAutomaticLink,pandocEmDash,pandocEnDash,pandocFootnoteDef,pandocFootnoteBlock,pandocFootnoteID
-    syn match pandocDefinitionBlockTerm /^.*\n\(^\s*\n\)\=\(\s*[:~]\)\@=/ contained contains=pandocNoFormatted,pandocEmphasis,pandocStrong,pandocLaTeXInlineMath,pandocEscapedDollar,pandocFootnoteDef,pandocFootnoteBlock,pandocFootnoteID nextgroup=pandocDefinitionBlockMark
+    syn region pandocDefinitionBlock start=/^\%(\_^\s*\([`~]\)\1\{2,}\)\@!.*\n\(^\s*\n\)\=\s\{0,2}\([:~]\)\(\3\{2,}\3*\)\@!/ skip=/\n\n\zs\s/ end=/\n\n/ contains=@Spell,pandocDefinitionBlockMark,pandocDefinitionBlockTerm,pandocCodeBlockInsideIndent,pandocEmphasis,pandocStrong,pandocStrongEmphasis,pandocNoFormatted,pandocStrikeout,pandocSubscript,pandocSuperscript,pandocFootnoteID,pandocReferenceURL,pandocReferenceLabel,pandocLaTeXMathBlock,pandocLaTeXInlineMath,pandocEscapedDollar,pandocAutomaticLink,pandocEmDash,pandocEnDash,pandocFootnoteDef,pandocFootnoteBlock,pandocFootnoteID
+    syn match pandocDefinitionBlockTerm /^.*\n\(^\s*\n\)\=\(\s*[:~]\)\@=/ contained contains=@Spell,pandocNoFormatted,pandocEmphasis,pandocStrong,pandocLaTeXInlineMath,pandocEscapedDollar,pandocFootnoteDef,pandocFootnoteBlock,pandocFootnoteID nextgroup=pandocDefinitionBlockMark
     call s:WithConceal('definition', 'syn match pandocDefinitionBlockMark /^\s*[:~]/ contained', 'conceal cchar='.s:cchars['definition'])
 endif
 " }}}2
@@ -551,7 +556,7 @@
 " }}}3
 
 " &-escaped Special Characters: {{{3
-syn match pandocAmpersandEscape /\v\&(#\d+|#x\x+|[[:alnum:]]+)\;/ contains=NoSpell
+syn match pandocAmpersandEscape /\v\&(#\d+|#x\x+|[[:alnum:]]+)\;/ contains=@NoSpell
 " }}}3
 
 " YAML: {{{2
@@ -703,7 +708,7 @@
 syntax sync clear
 syntax sync minlines=1000
 
-let &cpo = s:cpo_save
+let &cpoptions = s:cpo_save
 unlet s:cpo_save
 
 " vim: set fdm=marker foldlevel=0: