diff --git a/Library/Think/Parser/Driver/Markdown.php b/Library/Think/Parser/Driver/Markdown.php
index ff1865ed..334f7a60 100644
--- a/Library/Think/Parser/Driver/Markdown.php
+++ b/Library/Think/Parser/Driver/Markdown.php
@@ -34,7 +34,7 @@ class Markdown {
 
 	### Version ###
 
-	public const MARKDOWNLIB_VERSION  =  "1.3-beta4";
+	const MARKDOWNLIB_VERSION  =  "1.3-beta4";
 
 	### Simple Function Interface ###