diff --git a/packages/editor-ext/src/lib/markdown/utils/tabs.marked.ts b/packages/editor-ext/src/lib/markdown/utils/tabs.marked.ts
index ed54b78ea..54e2f3372 100644
--- a/packages/editor-ext/src/lib/markdown/utils/tabs.marked.ts
+++ b/packages/editor-ext/src/lib/markdown/utils/tabs.marked.ts
@@ -14,7 +14,7 @@ interface TabbedToken {
 }
 
 const HEADER_RE =
-  /^===([!+])?\s*["'“”‘’]((?:\\.|[^"'“”‘’\n])+?)["'“”‘’]\s*$/gm;
+  /^===([!+])?\s*["'“”‘’]((?:\\["\\]|[^\\"'“”‘’\n])+?)["'“”‘’]\s*$/gm;
 
 export const tabsExtension = {
   name: 'tabbed',