diff --git a/app/controllers/admin/GroupsController.php b/app/controllers/admin/GroupsController.php
index 56dc76bb034e..9ab1e3798932 100755
--- a/app/controllers/admin/GroupsController.php
+++ b/app/controllers/admin/GroupsController.php
@@ -56,7 +56,7 @@ public function postCreate()
 	{
 		// Declare the rules for the form validation
 		$rules = array(
-			'name' => 'required',
+			'name' => 'required|alpha_dash|min:2',
 		);
 
 		// Create a new validator instance from our validation rules
@@ -162,7 +162,7 @@ public function postEdit($id = null)
 
 		// Declare the rules for the form validation
 		$rules = array(
-			'name' => 'required',
+			'name' => 'required|alpha_dash|min:2',
 		);
 
 		// Create a new validator instance from our validation rules
diff --git a/app/controllers/admin/LicensesController.php b/app/controllers/admin/LicensesController.php
index 8a91ae534b54..7cd9dbf8f9d2 100644
--- a/app/controllers/admin/LicensesController.php
+++ b/app/controllers/admin/LicensesController.php
@@ -258,7 +258,7 @@ public function postCheckout($seatId)
 
 		// Declare the rules for the form validation
 		$rules = array(
-			'assigned_to'   => 'required|min:1'
+			'assigned_to'   => 'required|integer|min:1'
 		);
 
 		// Create a new validator instance from our validation rules
diff --git a/app/controllers/admin/UsersController.php b/app/controllers/admin/UsersController.php
index 1ebf7daaef21..9f88e9d7b7c0 100755
--- a/app/controllers/admin/UsersController.php
+++ b/app/controllers/admin/UsersController.php
@@ -27,8 +27,8 @@ class UsersController extends AdminController {
 	 * @var array
 	 */
 	protected $validationRules = array(
-		'first_name'       => 'required|min:3',
-		'last_name'        => 'required|min:3',
+		'first_name'       => 'required|alpha_dash|min:3',
+		'last_name'        => 'required|alpha_dash|min:3',
 		'email'            => 'required|email|unique:users,email',
 		'password'         => 'required|between:3,32',
 		'password_confirm' => 'required|between:3,32|same:password',