diff --git a/.vim/after/syntax/pandoc.vim b/.vim/after/syntax/pandoc.vim
index 4fc4e75..f176ac6 100644
--- a/.vim/after/syntax/pandoc.vim
+++ b/.vim/after/syntax/pandoc.vim
@@ -6,7 +6,7 @@ hi! link pandocCiteAnchor Comment
 hi! link pandocCiteLocator Comment
 
 " Match cloze delimiters e.g. `{{c1::` and `}}`
-syn match ClozeDelimiter /{{c\d::/ conceal containedin=pandocUListItem,pandocListItem
+syn match ClozeDelimiter /{{c\d\+::/ conceal containedin=pandocUListItem,pandocListItem
 syn match ClozeDelimiter /}}/ conceal containedin=pandocUListItem,pandocListItem
 " Match text between cloze delimiters
 syn match Cloze /\({{c\d\+::\)\@<=\(\_[A-Za-z0-9$\ \\\-\*,_]*\)\(}}\)\@=/ containedin=pandocUListItem,pandocListItem