Update README.md

kimtree · kimtree · commit 58719d9a11a6 · 2017-02-28T04:18:20.000+09:00
diff --git a/README.md b/README.md
@@ -16,6 +16,7 @@ codeigniter/
 ## Requirements
 
 * PHP 5.4.0 or later
+* Twig 1.22.0 or later (Also, simply checked with Twig v2.x)
 
 ## Installation
 
