diff --git a/runtime/syntax/markdown.vim b/runtime/syntax/markdown.vim
index 4ec5dd5..068115e 100644
--- a/runtime/syntax/markdown.vim
+++ b/runtime/syntax/markdown.vim
@@ -2,50 +2,66 @@
 " Language:     Markdown
 " Maintainer:   Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:    *.markdown
-" Last Change:	2010 May 21
+" Last Change:  2013 May 30
 
 if exists("b:current_syntax")
   finish
 endif
 
+if !exists('main_syntax')
+  let main_syntax = 'markdown'
+endif
+
 runtime! syntax/html.vim
 unlet! b:current_syntax
 
+if !exists('g:markdown_fenced_languages')
+  let g:markdown_fenced_languages = []
+endif
+for s:type in map(copy(g:markdown_fenced_languages),'matchstr(v:val,"[^=]*$")')
+  if s:type =~ '\.'
+    let b:{matchstr(s:type,'[^.]*')}_subtype = matchstr(s:type,'\.\zs.*')
+  endif
+  exe 'syn include @markdownHighlight'.substitute(s:type,'\.','','g').' syntax/'.matchstr(s:type,'[^.]*').'.vim'
+  unlet! b:current_syntax
+endfor
+unlet! s:type
+
 syn sync minlines=10
 syn case ignore
 
-syn match markdownValid '[<>]\S\@!'
+syn match markdownValid '[<>]\c[a-z/$!]\@!'
 syn match markdownValid '&\%(#\=\w*;\)\@!'
 
-syn match markdownLineStart "^[<@]\@!" nextgroup=@markdownBlock
+syn match markdownLineStart "^[<@]\@!" nextgroup=@markdownBlock,htmlSpecialChar
 
 syn cluster markdownBlock contains=markdownH1,markdownH2,markdownH3,markdownH4,markdownH5,markdownH6,markdownBlockquote,markdownListMarker,markdownOrderedListMarker,markdownCodeBlock,markdownRule
-syn cluster markdownInline contains=markdownLineBreak,markdownLinkText,markdownItalic,markdownBold,markdownCode,markdownEscape,@htmlTop
+syn cluster markdownInline contains=markdownLineBreak,markdownLinkText,markdownItalic,markdownBold,markdownCode,markdownEscape,@htmlTop,markdownError
 
-syn match markdownH1 ".\+\n=\+$" contained contains=@markdownInline,markdownHeadingRule
-syn match markdownH2 ".\+\n-\+$" contained contains=@markdownInline,markdownHeadingRule
+syn match markdownH1 "^.\+\n=\+$" contained contains=@markdownInline,markdownHeadingRule,markdownAutomaticLink
+syn match markdownH2 "^.\+\n-\+$" contained contains=@markdownInline,markdownHeadingRule,markdownAutomaticLink
 
 syn match markdownHeadingRule "^[=-]\+$" contained
 
-syn region markdownH1 matchgroup=markdownHeadingDelimiter start="##\@!"      end="#*\s*$" keepend oneline contains=@markdownInline contained
-syn region markdownH2 matchgroup=markdownHeadingDelimiter start="###\@!"     end="#*\s*$" keepend oneline contains=@markdownInline contained
-syn region markdownH3 matchgroup=markdownHeadingDelimiter start="####\@!"    end="#*\s*$" keepend oneline contains=@markdownInline contained
-syn region markdownH4 matchgroup=markdownHeadingDelimiter start="#####\@!"   end="#*\s*$" keepend oneline contains=@markdownInline contained
-syn region markdownH5 matchgroup=markdownHeadingDelimiter start="######\@!"  end="#*\s*$" keepend oneline contains=@markdownInline contained
-syn region markdownH6 matchgroup=markdownHeadingDelimiter start="#######\@!" end="#*\s*$" keepend oneline contains=@markdownInline contained
+syn region markdownH1 matchgroup=markdownHeadingDelimiter start="##\@!"      end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH2 matchgroup=markdownHeadingDelimiter start="###\@!"     end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH3 matchgroup=markdownHeadingDelimiter start="####\@!"    end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH4 matchgroup=markdownHeadingDelimiter start="#####\@!"   end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH5 matchgroup=markdownHeadingDelimiter start="######\@!"  end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH6 matchgroup=markdownHeadingDelimiter start="#######\@!" end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
 
-syn match markdownBlockquote ">\s" contained nextgroup=@markdownBlock
+syn match markdownBlockquote ">\%(\s\|$\)" contained nextgroup=@markdownBlock
 
 syn region markdownCodeBlock start="    \|\t" end="$" contained
 
 " TODO: real nesting
-syn match markdownListMarker " \{0,4\}[-*+]\%(\s\+\S\)\@=" contained
-syn match markdownOrderedListMarker " \{0,4}\<\d\+\.\%(\s*\S\)\@=" contained
+syn match markdownListMarker "\%(\t\| \{0,4\}\)[-*+]\%(\s\+\S\)\@=" contained
+syn match markdownOrderedListMarker "\%(\t\| \{0,4}\)\<\d\+\.\%(\s\+\S\)\@=" contained
 
 syn match markdownRule "\* *\* *\*[ *]*$" contained
 syn match markdownRule "- *- *-[ -]*$" contained
 
-syn match markdownLineBreak "\s\{2,\}$"
+syn match markdownLineBreak " \{2,\}$"
 
 syn region markdownIdDeclaration matchgroup=markdownLinkDelimiter start="^ \{0,3\}!\=\[" end="\]:" oneline keepend nextgroup=markdownUrl skipwhite
 syn match markdownUrl "\S\+" nextgroup=markdownUrlTitle skipwhite contained
@@ -61,14 +77,23 @@
 
 syn region markdownItalic start="\S\@<=\*\|\*\S\@=" end="\S\@<=\*\|\*\S\@=" keepend contains=markdownLineStart
 syn region markdownItalic start="\S\@<=_\|_\S\@=" end="\S\@<=_\|_\S\@=" keepend contains=markdownLineStart
-syn region markdownBold start="\S\@<=\*\*\|\*\*\S\@=" end="\S\@<=\*\*\|\*\*\S\@=" keepend contains=markdownLineStart
-syn region markdownBold start="\S\@<=__\|__\S\@=" end="\S\@<=__\|__\S\@=" keepend contains=markdownLineStart
+syn region markdownBold start="\S\@<=\*\*\|\*\*\S\@=" end="\S\@<=\*\*\|\*\*\S\@=" keepend contains=markdownLineStart,markdownItalic
+syn region markdownBold start="\S\@<=__\|__\S\@=" end="\S\@<=__\|__\S\@=" keepend contains=markdownLineStart,markdownItalic
 syn region markdownBoldItalic start="\S\@<=\*\*\*\|\*\*\*\S\@=" end="\S\@<=\*\*\*\|\*\*\*\S\@=" keepend contains=markdownLineStart
 syn region markdownBoldItalic start="\S\@<=___\|___\S\@=" end="\S\@<=___\|___\S\@=" keepend contains=markdownLineStart
-syn region markdownCode matchgroup=markdownCodeDelimiter start="`" end="`" transparent keepend contains=markdownLineStart
+syn region markdownCode matchgroup=markdownCodeDelimiter start="`" end="`" keepend contains=markdownLineStart
 syn region markdownCode matchgroup=markdownCodeDelimiter start="`` \=" end=" \=``" keepend contains=markdownLineStart
+syn region markdownCode matchgroup=markdownCodeDelimiter start="^\s*```.*$" end="^\s*```\ze\s*$" keepend
+
+if main_syntax ==# 'markdown'
+  for s:type in g:markdown_fenced_languages
+    exe 'syn region markdownHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\..*','','').' matchgroup=markdownCodeDelimiter start="^\s*```'.matchstr(s:type,'[^=]*').'\>.*$" end="^\s*```\ze\s*$" keepend contains=@markdownHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\.','','g')
+  endfor
+  unlet! s:type
+endif
 
 syn match markdownEscape "\\[][\\`*_{}()#+.!-]"
+syn match markdownError "\w\@<=_\w\@="
 
 hi def link markdownH1                    htmlH1
 hi def link markdownH2                    htmlH2
@@ -99,7 +124,11 @@
 hi def link markdownCodeDelimiter         Delimiter
 
 hi def link markdownEscape                Special
+hi def link markdownError                 Error
 
 let b:current_syntax = "markdown"
+if main_syntax ==# 'markdown'
+  unlet main_syntax
+endif
 
 " vim:set sw=2: