diff --git a/README.md b/README.md
index 2f032250..7f06e01e 100644
--- a/README.md
+++ b/README.md
@@ -518,7 +518,7 @@ specify a custom `RegExp` or use the value `null` to disable the feature.
 The default value:
 
 ```javascript
-/((^---\s*$[\s\S]*?^---\s*)|(^\+\+\+\s*$[\s\S]*?^(\+\+\+|\.\.\.)\s*)|(^\{\s*$[\s\S]*?^\}\s*))(\r\n|\r|\n|$)/m
+/((^---\s*$[\s\S]+?^---\s*)|(^\+\+\+\s*$[\s\S]+?^(\+\+\+|\.\.\.)\s*)|(^\{\s*$[\s\S]+?^\}\s*))(\r\n|\r|\n|$)/m
 ```
 
 Ignores [YAML](https://en.wikipedia.org/wiki/YAML),
diff --git a/demo/markdownlint-browser.js b/demo/markdownlint-browser.js
index 934999e7..02e42707 100644
--- a/demo/markdownlint-browser.js
+++ b/demo/markdownlint-browser.js
@@ -52,7 +52,7 @@ module.exports.newLineRe = newLineRe;
 // Regular expression for matching common front matter (YAML and TOML)
 module.exports.frontMatterRe =
 // eslint-disable-next-line max-len
-/((^---\s*$[\s\S]*?^---\s*)|(^\+\+\+\s*$[\s\S]*?^(\+\+\+|\.\.\.)\s*)|(^\{\s*$[\s\S]*?^\}\s*))(\r\n|\r|\n|$)/m;
+/((^---\s*$[\s\S]+?^---\s*)|(^\+\+\+\s*$[\s\S]+?^(\+\+\+|\.\.\.)\s*)|(^\{\s*$[\s\S]+?^\}\s*))(\r\n|\r|\n|$)/m;
 
 // Regular expression for matching the start of inline disable/enable comments
 var inlineCommentStartRe =
diff --git a/helpers/helpers.js b/helpers/helpers.js
index b4dc2f77..66e1e33a 100644
--- a/helpers/helpers.js
+++ b/helpers/helpers.js
@@ -10,7 +10,7 @@ module.exports.newLineRe = newLineRe;
 // Regular expression for matching common front matter (YAML and TOML)
 module.exports.frontMatterRe =
   // eslint-disable-next-line max-len
-  /((^---\s*$[\s\S]*?^---\s*)|(^\+\+\+\s*$[\s\S]*?^(\+\+\+|\.\.\.)\s*)|(^\{\s*$[\s\S]*?^\}\s*))(\r\n|\r|\n|$)/m;
+  /((^---\s*$[\s\S]+?^---\s*)|(^\+\+\+\s*$[\s\S]+?^(\+\+\+|\.\.\.)\s*)|(^\{\s*$[\s\S]+?^\}\s*))(\r\n|\r|\n|$)/m;
 
 // Regular expression for matching the start of inline disable/enable comments
 const inlineCommentStartRe =