diff --git a/src/components/markdown-renderer/markdown-extension/gist/replace-legacy-gist-short-code.ts b/src/components/markdown-renderer/markdown-extension/gist/replace-legacy-gist-short-code.ts
index 49073ccfe..54bd62c03 100644
--- a/src/components/markdown-renderer/markdown-extension/gist/replace-legacy-gist-short-code.ts
+++ b/src/components/markdown-renderer/markdown-extension/gist/replace-legacy-gist-short-code.ts
@@ -7,7 +7,7 @@
 import type { RegexOptions } from '../../../../external-types/markdown-it-regex/interface'
 import { GistMarkdownExtension } from './gist-markdown-extension'
 
-const finalRegex = /^{%gist (\w+\/\w+) ?%}$/
+const finalRegex = /^{%gist\s+(\w+\/\w+)\s*%}$/
 
 /**
  * Replacer for legacy hedgedoc 1 gist shortcodes.