diff --git a/README.md b/README.md
index 041be7c..5403a5d 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 xml-writer-plus
 ===============
 
-Simple XML Writer library for PHP 5.3+
+Simple XML Writer library for PHP 5.4+
 
 The goal of this library is to provide some added functionality to the built-in PHP <a href="http://www.php.net//manual/en/book.xmlwriter.php" target="_blank">XMLWriter</a> class.
 
diff --git a/composer.json b/composer.json
index d525de8..df5258d 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
     "name" : "dcarbone/xml-writer-plus",
     "type" : "library",
-    "description" : "Simple XML Writer library for PHP 5.3+",
+    "description" : "Simple XML Writer library for PHP 5.4+",
 
     "keywords": [
         "php",
@@ -19,7 +19,7 @@
     ],
 
     "require" : {
-        "php" : ">=5.3.3",
+        "php" : ">=5.4.0",
         "lib-libxml" : "*"
     },
     "autoload" : {