diff --git a/README.md b/README.md
index 8e63f258..6a940044 100644
--- a/README.md
+++ b/README.md
@@ -2,13 +2,17 @@
 
 ## Usage
 
-  $json = json_decode($input_json);
-  $schema = json_decode($input_schema);
-  $result = JsonSchema::validate($json, $schema);
-  
-  if ($result->valid) {
+```php
+<?php
+
+$json = json_decode($input_json);
+$schema = json_decode($input_schema);
+$result = JsonSchema::validate($json, $schema);
+
+if ($result->valid) {
     die('success!');
-  }
-  else {
+}
+else {
     die('fail...');
-  }
+}
+```
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 00000000..a3040886
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,19 @@
+{
+    "name": "justinrainbow/json-schema",
+    "description": "a library to validate a json schema"
+    "keywords": ["json", "schema"],
+    "homepage": "https://github.com/justinrainbow/json-schema",
+    "type": "library",
+    "license": "MIT",
+    "version": "1.0.0",
+    "authors": [
+        {
+            "name": "Justin Rainbow"
+        }
+    ],
+    
+    "autoload": {
+        "psr-0": { "JsonSchema": "libs/", "JsonSchemaUndefined": "libs/"}
+    }
+}
+    
diff --git a/libs/JsonSchema.php b/libs/JsonSchema.php
index d5e06715..a324a3ef 100644
--- a/libs/JsonSchema.php
+++ b/libs/JsonSchema.php
@@ -169,7 +169,7 @@ static function checkProp($value, $schema, $path, $i = '', $_changing = false) {
     }
     // verify optional values
     if (is_object($value) && $value instanceOf JsonSchemaUndefined) {
-  	  if ( isset($schema->optional) ? !$schema->optional : true) {
+  	  if ( isset($schema->required) ? !$schema->required : true) {
 	    self::adderror($path,"is missing and it is not optional");
 	  }
     }