diff --git a/composer.json b/composer.json
index 2b6f47f..24f95ad 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
     "require": {
         "php": "^7.0",
         "guzzlehttp/guzzle": "^6.3",
-        "doctrine/inflector": "^1.1"
+        "doctrine/inflector": "^1.2"
     },
     "require-dev": {
         "phpunit/phpunit": "^6.2"
diff --git a/src/SubResources/Categorized.php b/src/SubResources/Categorized.php
index 442ba44..f2eedf9 100644
--- a/src/SubResources/Categorized.php
+++ b/src/SubResources/Categorized.php
@@ -9,9 +9,9 @@ abstract class Categorized
 
     public $category;
 
-    const WORK = 'work';
-    const PERSONAL = 'personal';
-    const OTHER = 'other';
+    const WORK = 'Work';
+    const PERSONAL = 'Personal';
+    const OTHER = 'Other';
 
     /**
      * Categorized subresource constructor.
@@ -21,4 +21,4 @@ public function __construct($category) {
         $this->category = $category;
     }
 
-}
\ No newline at end of file
+}
diff --git a/src/SubResources/Phone.php b/src/SubResources/Phone.php
index db7afac..c584e90 100644
--- a/src/SubResources/Phone.php
+++ b/src/SubResources/Phone.php
@@ -14,11 +14,11 @@ class Phone extends Categorized
 
     public $number;
 
-    const MOBILE = 'mobile';
-    const HOME = 'home';
+    const MOBILE = 'Mobile';
+    const HOME = 'Home';
 
     /** @deprecated */
-    const PERSONAL = 'personal';
+    const PERSONAL = 'Personal';
 
     protected $simpleNumber;
     protected $extension;
@@ -39,4 +39,4 @@ public function __construct(string $number, string $category)
             $this->simpleNumber = $number;
         }
     }
-}
\ No newline at end of file
+}