diff --git a/README.md b/README.md
index 452f2f7..616083a 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ See the examples for example usage. The php files have "some" doumentation in th
 ### Import
 Add this requirement to your `composer.json` file:
 ```json
-    "grandt/phpepub": ">=4.0.2"
+    "grandt/phpepub": ">=4.0.3"
 ```
 
 ### Composer
@@ -42,7 +42,7 @@ Once composer is installed you can create the `composer.json` file to import thi
 ```json
 {
     "require": {
-        "grandt/phpepub": ">=4.0.2",
+        "grandt/phpepub": ">=4.0.3",
         "php": ">=5.3.0"
     }
 }
diff --git a/REVISION.TXT b/REVISION.TXT
index 9d338da..78a7c96 100644
--- a/REVISION.TXT
+++ b/REVISION.TXT
@@ -1,4 +1,10 @@
 ---------------------------------------------------------------------
+Rev. 4.0.3 - 2015-09-15
+* Changed: Added functions addCustomNamespace, addCustomPrefix, addCustomMetaValue and addCustomMetaProperty
+*          to enable users to add needed namespaces or prefixes (prefixes are only supported in ePub3)
+*          as well as meta properties and entries specified by those namespaces.
+*          See tests/EPub.Example1.php (line 95+) and tests/EPub.Example3.php (line 66+) for how they are used.
+---------------------------------------------------------------------
 Rev. 4.0.2 - 2015-09-15
 * Changed: Added function addFileToMETAINF to enable users to add the apple ibooks metadata.
 *   $book->addFileToMETAINF("com.apple.ibooks.display-options.xml", $xmldata);
diff --git a/composer.json b/composer.json
index f5fa00c..9bdaeb5 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,7 @@
     "keywords": ["epub", "e-book"],
     "homepage": "https://github.com/Grandt/PHPZip",
     "license": "LGPL-2.1",
-    "version": "4.0.2",
+    "version": "4.0.3",
     "minimum-stability": "stable",
     "authors": [
         {