diff --git a/src/Exceptions/InvalidPeriod.php b/src/Exceptions/InvalidPeriod.php
new file mode 100644
index 0000000..e6ee97c
--- /dev/null
+++ b/src/Exceptions/InvalidPeriod.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Awssat\Visits\Exceptions;
+
+class InvalidPeriod extends \Exception
+{
+    public function __construct($period)
+    {
+        parent::__construct("Invalid period of Laravel-Visits: $period");
+    }
+}
diff --git a/src/Traits/Setters.php b/src/Traits/Setters.php
index 3cc7255..101d81e 100755
--- a/src/Traits/Setters.php
+++ b/src/Traits/Setters.php
@@ -2,6 +2,8 @@
 
 namespace Awssat\Visits\Traits;
 
+use Awssat\Visits\Exceptions\InvalidPeriod;
+
 trait Setters
 {
     /**
@@ -84,6 +86,8 @@ public function period($period)
     {
         if (in_array($period, $this->periods)) {
             $this->keys->visits = $this->keys->period($period);
+        } else {
+            throw new InvalidPeriod($period);
         }
 
         return $this;