diff --git a/system/core/Benchmark.php b/system/core/Benchmark.php
index 80933f4..d0e1fc6 100644
--- a/system/core/Benchmark.php
+++ b/system/core/Benchmark.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
index c50ae6d..be5a271 100644
--- a/system/core/CodeIgniter.php
+++ b/system/core/CodeIgniter.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Common.php b/system/core/Common.php
index 90ba7c9..56fe713 100644
--- a/system/core/Common.php
+++ b/system/core/Common.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Config.php b/system/core/Config.php
index 24503ab..b7055c6 100644
--- a/system/core/Config.php
+++ b/system/core/Config.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Exceptions.php b/system/core/Exceptions.php
index 108861d..26b24ef 100644
--- a/system/core/Exceptions.php
+++ b/system/core/Exceptions.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Hooks.php b/system/core/Hooks.php
index 9026a5e..3f84194 100644
--- a/system/core/Hooks.php
+++ b/system/core/Hooks.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Input.php b/system/core/Input.php
index df3be20..f959b28 100644
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Lang.php b/system/core/Lang.php
index cbd4e38..a53a202 100644
--- a/system/core/Lang.php
+++ b/system/core/Lang.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 2324eca..3fc9d4c 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Model.php b/system/core/Model.php
index f6098d0..80f4b04 100644
--- a/system/core/Model.php
+++ b/system/core/Model.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Output.php b/system/core/Output.php
index 04e452d..2ded283 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Router.php b/system/core/Router.php
index 918ea24..06c8d48 100644
--- a/system/core/Router.php
+++ b/system/core/Router.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/URI.php b/system/core/URI.php
index a3bd450..b8d48c5 100644
--- a/system/core/URI.php
+++ b/system/core/URI.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
diff --git a/system/core/Unicode.php b/system/core/Unicode.php
index 3aeb51b..20605ee 100644
--- a/system/core/Unicode.php
+++ b/system/core/Unicode.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 4.3.2 or newer
+ * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team