diff --git a/lib/rules_core/normalize.js b/lib/rules_core/normalize.js
index 68fb392..ad196cd 100644
--- a/lib/rules_core/normalize.js
+++ b/lib/rules_core/normalize.js
@@ -3,7 +3,8 @@
 'use strict';
 
 
-var NEWLINES_RE  = /\r[\n\x85]?|[\u2424\x85]/g;
+// https://spec.commonmark.org/0.29/#line-ending
+var NEWLINES_RE  = /\r\n?|\n/g;
 var NULL_RE      = /\0/g;