diff --git a/README.md b/README.md
index 50d4870..d12688f 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ directly into your own project and use it.
 If you find problem in the code or want to extend it feel free to fork it and send us
 a pull request.
 
-This code should work with PHP 5 (>= 5.2.0). PHP modules needed are: bcmath,
+This code should work with PHP 5 (>= 5.3.0). PHP modules needed are: bcmath,
 openssl, curl, mbstring and json.
 
 Overview
diff --git a/composer.json b/composer.json
index fe985ce..de37412 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
 		"ext-openssl": "*",
 		"ext-curl": "*",
 		"ext-mbstring": "*",
-		"php": ">=5.2.0"
+		"php": ">=5.3.0"
 	},
 	"autoload": {
 		"files": ["Trustly.php"]