diff --git a/syntax/markdown.vim b/syntax/markdown.vim
index 5700d4b..2609df1 100644
--- a/syntax/markdown.vim
+++ b/syntax/markdown.vim
@@ -37,17 +37,17 @@ syn match markdownLineStart "^[<@]\@!" nextgroup=@markdownBlock
 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,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