diff --git a/syntax/markdown.vim b/syntax/markdown.vim
index a069746..b5ef093 100644
--- a/syntax/markdown.vim
+++ b/syntax/markdown.vim
@@ -2,7 +2,7 @@
 " Language:     Markdown
 " Maintainer:   Tim Pope <https://github.com/tpope/vim-markdown>
 " Filenames:    *.markdown
-" Last Change:  2022 Oct 13
+" Last Change:  2026 Sep 09
 
 if exists("b:current_syntax")
   finish
@@ -74,12 +74,12 @@ syn match markdownH2 "^.\+\n-\+$" contained contains=@markdownInline,markdownHea
 
 syn match markdownHeadingRule "^[=-]\+$" contained
 
-syn region markdownH1 matchgroup=markdownH1Delimiter start=" \{,3}#\s"      end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH2 matchgroup=markdownH2Delimiter start=" \{,3}##\s"     end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH3 matchgroup=markdownH3Delimiter start=" \{,3}###\s"    end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH4 matchgroup=markdownH4Delimiter start=" \{,3}####\s"   end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH5 matchgroup=markdownH5Delimiter start=" \{,3}#####\s"  end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH6 matchgroup=markdownH6Delimiter start=" \{,3}######\s" end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH1 matchgroup=markdownH1Delimiter start="\%#=1 \{,3}#\s"      end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH2 matchgroup=markdownH2Delimiter start="\%#=1 \{,3}##\s"     end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH3 matchgroup=markdownH3Delimiter start="\%#=1 \{,3}###\s"    end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH4 matchgroup=markdownH4Delimiter start="\%#=1 \{,3}####\s"   end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH5 matchgroup=markdownH5Delimiter start="\%#=1 \{,3}#####\s"  end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH6 matchgroup=markdownH6Delimiter start="\%#=1 \{,3}######\s" end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
 
 syn match markdownBlockquote ">\%(\s\|$\)" contained nextgroup=@markdownBlock
 
@@ -87,7 +87,7 @@ syn region markdownCodeBlock start="^\n\( \{4,}\|\t\)" end="^\ze \{,3}\S.*$" kee
 
 " TODO: real nesting
 syn match markdownListMarker "\%(\t\| \{0,4\}\)[-*+]\%(\s\+\S\)\@=" contained
-syn match markdownOrderedListMarker "\%(\t\| \{0,4}\)\<\d\+\.\%(\s\+\S\)\@=" contained
+syn match markdownOrderedListMarker "\%#=1\%(\t\| \{0,4}\)\<\d\+\.\%(\s\+\S\)\@=" contained
 
 syn match markdownRule "\* *\* *\*[ *]*$" contained
 syn match markdownRule "- *- *-[ -]*$" contained