diff --git a/README.md b/README.md
index 36dc9b7..86d2a6b 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Add the following to your `composer.json` file:
 ```json
 {
   "require": {
-    "inakiabt/etsy-php": "dev-master"
+    "inakiabt/etsy-php": ">=0.9.0"
   }
 }
 ```
diff --git a/composer.json b/composer.json
index cd5a63a..c925da9 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
     "name": "inakiabt/etsy-php",
-    "version": "0.9.0",
+    "version": "0.9.1",
     "description": "Simple PHP wrapper for Etsy API",
     "license": "MIT",
     "authors": [
diff --git a/src/Etsy/EtsyApi.php b/src/Etsy/EtsyApi.php
index a498109..a185235 100644
--- a/src/Etsy/EtsyApi.php
+++ b/src/Etsy/EtsyApi.php
@@ -94,7 +94,7 @@ protected function validateResponse($request_args, $response)
 
 	private function prepareParameters($params) {
 		$query_pairs = array();
-		$allowed = array("limit", "offset", "page", "sort_on", "sort_order", "include_private");
+		$allowed = array("limit", "offset", "page", "sort_on", "sort_order", "include_private", "language");
 
 		if ($params) {
 			foreach($params as $key=>$value) {
diff --git a/src/Etsy/EtsyClient.php b/src/Etsy/EtsyClient.php
index cd99ea6..9495170 100644
--- a/src/Etsy/EtsyClient.php
+++ b/src/Etsy/EtsyClient.php
@@ -102,6 +102,10 @@ public function getConsumerSecret()
 		return $this->consumer_secret;
 	}
 
+	public function getLastResponseHeaders(){
+        	return $this->oauth->getLastResponseHeaders();
+    	}
+    	
 	public function setDebug($debug)
 	{
 		$this->debug = $debug;
diff --git a/src/Etsy/RequestValidator.php b/src/Etsy/RequestValidator.php
index 8846f23..c4b06fb 100644
--- a/src/Etsy/RequestValidator.php
+++ b/src/Etsy/RequestValidator.php
@@ -52,7 +52,9 @@ public static function validateData($args, $methodInfo)
 			$result['_invalid'][] = 'Method not found';
 			return $result;
 		}
+
 		$methodsParams = $methodInfo['params'];
+
 		foreach ($args as $name => $arg)
 		{
 			if (isset($methodsParams[$name]))
@@ -85,16 +87,26 @@ public static function validateData($args, $methodInfo)
 									case 'double':
 										$item_type = 'float';
 										break;
-								}								
+								}
 								$type = 'array('.$item_type.')';
 							}
 						}
 						break;
 				}
+
 				if ($validType !== $type)
 				{
-					if (substr($validType, 0, 4) === 'enum')
+					if( $validType === "boolean" && $type === "string" )
 					{
+						if( $arg === "false" || $arg === "true" || $arg === "0" || $arg === "1")
+						{
+							$result['_valid'][$name] = $arg;
+						}
+						else
+						{
+							$result['_invalid'][] = RequestValidator::invalidParam($name, $arg, gettype($arg));
+						}
+					} elseif (substr($validType, 0, 4) === 'enum') {
 						if ($arg === 'enum' || !preg_match("@".preg_quote($arg)."@", $validType))
 						{
 							$result['_invalid'][] = 'Invalid enum data param "'.$name.'" value ('.$arg.'): valid values "'.$validType.'"';
@@ -128,4 +140,4 @@ public static function invalidParamType($name, $value, $type, $validType)
 	{
 		return 'Invalid data param type "'.$name.'" ('.(is_array($value) ? implode(', ', $value) : $value).': '.$type.'): required type "'.$validType.'"';
 	}
-}
\ No newline at end of file
+}
diff --git a/src/Etsy/methods.json b/src/Etsy/methods.json
index 221a90e..b793590 100644
--- a/src/Etsy/methods.json
+++ b/src/Etsy/methods.json
@@ -367,7 +367,7 @@
       "tags": "array(string)",
       "who_made": "enum(i_did, collective, someone_else)",
       "is_supply": "boolean",
-      "when_made": "enum(made_to_order, 2010_2015, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
+      "when_made": "enum(made_to_order, 2010_2016, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
       "recipient": "enum(men, women, unisex_adults, teen_boys, teen_girls, teens, boys, girls, children, baby_boys, baby_girls, babies, birds, cats, dogs, pets)",
       "occasion": "enum(anniversary, baptism, bar_or_bat_mitzvah, birthday, canada_day, chinese_new_year, cinco_de_mayo, confirmation, christmas, day_of_the_dead, easter, eid, engagement, fathers_day, get_well, graduation, halloween, hanukkah, housewarming, kwanza, prom, july_4th, mothers_day, new_baby, new_years, quinceanera, retirement, st_patricks_day, sweet_16, sympathy, thanksgiving, valentines, wedding)",
       "style": "array(string)"
@@ -425,7 +425,7 @@
       "tags": "array(string)",
       "who_made": "enum(i_did, collective, someone_else)",
       "is_supply": "boolean",
-      "when_made": "enum(made_to_order, 2010_2015, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
+      "when_made": "enum(made_to_order, 2010_2016, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
       "recipient": "enum(men, women, unisex_adults, teen_boys, teen_girls, teens, boys, girls, children, baby_boys, baby_girls, babies, birds, cats, dogs, pets)",
       "occasion": "enum(anniversary, baptism, bar_or_bat_mitzvah, birthday, canada_day, chinese_new_year, cinco_de_mayo, confirmation, christmas, day_of_the_dead, easter, eid, engagement, fathers_day, get_well, graduation, halloween, hanukkah, housewarming, kwanza, prom, july_4th, mothers_day, new_baby, new_years, quinceanera, retirement, st_patricks_day, sweet_16, sympathy, thanksgiving, valentines, wedding)",
       "style": "array(string)",
@@ -752,7 +752,7 @@
       "property_id": "int",
       "value": "string",
       "is_available": "boolean",
-      "price": "int"
+      "price": "float"
     },
     "defaults": {
       "is_available": true,
@@ -771,7 +771,7 @@
       "property_id": "int",
       "value": "string",
       "is_available": "boolean",
-      "price": "int"
+      "price": "float"
     },
     "defaults": {
       "price": null
@@ -3393,4 +3393,4 @@
     "visibility": "public",
     "http_method": "GET"
   }
-}
\ No newline at end of file
+}
diff --git a/tests/Etsy/EtsyApiBuildRequestTest.php b/tests/Etsy/EtsyApiBuildRequestTest.php
index c504159..97b5126 100644
--- a/tests/Etsy/EtsyApiBuildRequestTest.php
+++ b/tests/Etsy/EtsyApiBuildRequestTest.php
@@ -76,7 +76,7 @@ public function testValidData()
 				"tags" => array('fashion, othertag'),
 				"who_made" => "collective",
 				"is_supply" => true,
-				"when_made" => "2010_2015",
+				"when_made" => "2010_2016",
 				"recipient" => "men",
 				"occasion" => "baptism",
 				"style" => array('style1, style2')
diff --git a/tests/Etsy/RequestValidatorTest.php b/tests/Etsy/RequestValidatorTest.php
index 621c05a..fa3fdae 100644
--- a/tests/Etsy/RequestValidatorTest.php
+++ b/tests/Etsy/RequestValidatorTest.php
@@ -134,7 +134,7 @@ public function testDataEmpty()
 	      "tags": "array(string)",
 	      "who_made": "enum(i_did, collective, someone_else)",
 	      "is_supply": "boolean",
-	      "when_made": "enum(made_to_order, 2010_2015, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
+	      "when_made": "enum(made_to_order, 2010_2016, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
 	      "recipient": "enum(men, women, unisex_adults, teen_boys, teen_girls, teens, boys, girls, children, baby_boys, baby_girls, babies, birds, cats, dogs, pets)",
 	      "occasion": "enum(anniversary, baptism, bar_or_bat_mitzvah, birthday, canada_day, chinese_new_year, cinco_de_mayo, confirmation, christmas, day_of_the_dead, easter, eid, engagement, fathers_day, get_well, graduation, halloween, hanukkah, housewarming, kwanza, prom, july_4th, mothers_day, new_baby, new_years, quinceanera, retirement, st_patricks_day, sweet_16, sympathy, thanksgiving, valentines, wedding)",
 	      "style": "array(string)"
@@ -413,4 +413,4 @@ public function testDataInvalidImageFileType()
 		$this->assertCount(1, $result['_invalid']);
 		$this->assertRegExp($this->invalidTypeRegExp, $result['_invalid'][0]);
 	}
-}
\ No newline at end of file
+}
diff --git a/tests/Etsy/methods.json b/tests/Etsy/methods.json
index a643a49..e9b88f3 100644
--- a/tests/Etsy/methods.json
+++ b/tests/Etsy/methods.json
@@ -366,7 +366,7 @@
       "tags": "array(string)",
       "who_made": "enum(i_did, collective, someone_else)",
       "is_supply": "boolean",
-      "when_made": "enum(made_to_order, 2010_2015, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
+      "when_made": "enum(made_to_order, 2010_2016, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
       "recipient": "enum(men, women, unisex_adults, teen_boys, teen_girls, teens, boys, girls, children, baby_boys, baby_girls, babies, birds, cats, dogs, pets)",
       "occasion": "enum(anniversary, baptism, bar_or_bat_mitzvah, birthday, canada_day, chinese_new_year, cinco_de_mayo, confirmation, christmas, day_of_the_dead, easter, eid, engagement, fathers_day, get_well, graduation, halloween, hanukkah, housewarming, kwanza, prom, july_4th, mothers_day, new_baby, new_years, quinceanera, retirement, st_patricks_day, sweet_16, sympathy, thanksgiving, valentines, wedding)",
       "style": "array(string)"
@@ -423,7 +423,7 @@
       "tags": "array(string)",
       "who_made": "enum(i_did, collective, someone_else)",
       "is_supply": "boolean",
-      "when_made": "enum(made_to_order, 2010_2015, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
+      "when_made": "enum(made_to_order, 2010_2016, 2000_2009, 1994_1999, before_1994, 1990_1993, 1980s, 1970s, 1960s, 1950s, 1940s, 1930s, 1920s, 1910s, 1900s, 1800s, 1700s, before_1700)",
       "recipient": "enum(men, women, unisex_adults, teen_boys, teen_girls, teens, boys, girls, children, baby_boys, baby_girls, babies, birds, cats, dogs, pets)",
       "occasion": "enum(anniversary, baptism, bar_or_bat_mitzvah, birthday, canada_day, chinese_new_year, cinco_de_mayo, confirmation, christmas, day_of_the_dead, easter, eid, engagement, fathers_day, get_well, graduation, halloween, hanukkah, housewarming, kwanza, prom, july_4th, mothers_day, new_baby, new_years, quinceanera, retirement, st_patricks_day, sweet_16, sympathy, thanksgiving, valentines, wedding)",
       "style": "array(string)",