diff --git a/syntax/markdown.vim b/syntax/markdown.vim
index 8fc4727..c39aaf4 100644
--- a/syntax/markdown.vim
+++ b/syntax/markdown.vim
@@ -85,8 +85,8 @@ syn region markdownCode matchgroup=markdownCodeDelimiter start="`" end="`" keepe
 syn region markdownCode matchgroup=markdownCodeDelimiter start="`` \=" end=" \=``" keepend contains=markdownLineStart
 syn region markdownCode matchgroup=markdownCodeDelimiter start="^\s*```.*$" end="^\s*```\ze\s*$" keepend
 
-syn match markdownFootnote "\[^[^\]]\]\s*$"
-syn match markdownFootnoteDefinition "^\[^[^\]]\]:"
+syn match markdownFootnote "\[^[^\]]\+\]\s*$"
+syn match markdownFootnoteDefinition "^\[^[^\]]\+\]:"
 
 if main_syntax ==# 'markdown'
   for s:type in g:markdown_fenced_languages