diff --git a/src/PrintNode/Credentials.php b/src/PrintNode/Credentials.php
index 571375a..1f11a8a 100755
--- a/src/PrintNode/Credentials.php
+++ b/src/PrintNode/Credentials.php
@@ -35,7 +35,7 @@ public function setEmailPassword($email, $password)
                 "ApiKey already set."
             );
 		}
-		$this->emailpassword = $email.': '.$password;
+		$this->emailPassword = $email.': '.$password;
 		return $this;
     }
 
diff --git a/src/PrintNode/PrintJob.php b/src/PrintNode/PrintJob.php
index 610713c..2bdbac4 100755
--- a/src/PrintNode/PrintJob.php
+++ b/src/PrintNode/PrintJob.php
@@ -16,6 +16,7 @@
  * @property-read int $filesize
  * @property-read DateTime $createTimestamp
  * @property-read string $state
+ * @property array $options
  */
 class PrintJob extends Entity
 {
@@ -29,6 +30,7 @@ class PrintJob extends Entity
     protected $createTimestamp;
     protected $state;
     protected $expireAt;
+    protected $options;
 
     public function foreignKeyEntityMap()
     {
diff --git a/src/PrintNode/Request.php b/src/PrintNode/Request.php
index 5727991..62cb9f3 100755
--- a/src/PrintNode/Request.php
+++ b/src/PrintNode/Request.php
@@ -489,7 +489,7 @@ public function getPrintJobsByPrinters()
      * @param string $computerId id of computer to find scales
      * @return Entity[]
      * */
-    public function getScales(string $computerId)
+    public function getScales($computerId)
     {
         $endPointUrl = $this->apiurl."/computer/";
         $endPointUrl.= $computerId;
@@ -522,7 +522,7 @@ public function getPrintersByComputers()
         $arguments = func_get_args();
 
         if (count($arguments) > 2) {
-            throw new InvalidArgumentException(
+            throw new \InvalidArgumentException(
                 sprintf(
                     'Too many arguments given to getPrintersByComputers.'
                 )
@@ -570,7 +570,7 @@ public function __call($methodName, $arguments)
             $arguments = array_shift($arguments);
 
             if (!is_string($arguments)) {
-                throw new InvalidArgumentException(
+                throw new \InvalidArgumentException(
                     sprintf(
                         'Invalid argument type passed to %s. Expecting a string got %s',
                         $methodName,
@@ -614,7 +614,7 @@ public function __call($methodName, $arguments)
     public function patch(Entity $entity)
     {
         if (!($entity instanceof Entity)) {
-            throw new InvalidArgumentException(
+            throw new \InvalidArgumentException(
                 sprintf(
                     'Invalid argument type passed to patch. Expecting Entity got %s',
                     gettype($entity)
@@ -644,7 +644,7 @@ public function patch(Entity $entity)
     public function post(Entity $entity)
     {
         if (!($entity instanceof Entity)) {
-            throw new InvalidArgumentException(
+            throw new \InvalidArgumentException(
                 sprintf(
                     'Invalid argument type passed to patch. Expecting Entity got %s',
                     gettype($entity)
@@ -677,7 +677,7 @@ public function put()
         $entity = array_shift($arguments);
 
         if (!($entity instanceof Entity)) {
-            throw new InvalidArgumentException(
+            throw new \InvalidArgumentException(
                 sprintf(
                     'Invalid argument type passed to patch. Expecting Entity got %s',
                     gettype($entity)
diff --git a/src/PrintNode/Scale.php b/src/PrintNode/Scale.php
index 3b60eb3..4f6af81 100755
--- a/src/PrintNode/Scale.php
+++ b/src/PrintNode/Scale.php
@@ -13,7 +13,7 @@
  * @property-read string $port
  * @property-read int $count
  * @property-read int[string] $measurement
- * @property-read DateTime $clientReportedCreateTimestamp
+ * @property-read \DateTime $clientReportedCreateTimestamp
  * @property-read string $ntpOffset
  * @property-read int $ageOfData
  * @property-read int $computerId
@@ -29,7 +29,7 @@ class Scale extends Entity
     protected $port;
     protected $count;
     protected $measurement;
-    protected $clientReprotedCreateTimestamp;
+    protected $clientReportedCreateTimestamp;
     protected $ntpOffset;
     protected $ageOfData;
     protected $computerId;