diff --git a/.gitignore b/.gitignore
index 56f0897..73341db 100755
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ composer.lock
 /.vscode
 .phpunit.result.cache
 dump.rdb
+.phpunit.cache/test-results
diff --git a/composer.json b/composer.json
index 9a038dc..569e71a 100755
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
         "jaybizzle/crawler-detect": "^1.2",
         "spatie/laravel-referer": "^1.6",
         "torann/geoip": "^1.0|^3.0",
-        "nesbot/carbon": "^2.0"
+        "nesbot/carbon": "^2.0|^3.0"
     },
     "require-dev": {
         "doctrine/dbal": "^2.6|^3.0",
diff --git a/src/Traits/Periods.php b/src/Traits/Periods.php
index 5acf0f4..306f84b 100755
--- a/src/Traits/Periods.php
+++ b/src/Traits/Periods.php
@@ -39,7 +39,7 @@ protected function newExpiration($period)
             throw new Exception("Wrong period: `{$period}`! please update config/visits.php file.");
         }
 
-        return $periodCarbon->diffInSeconds() + 1;
+        return intval(abs($periodCarbon->diffInSeconds())) + 1;
     }
 
     /**
diff --git a/tests/Feature/PeriodsTestCase.php b/tests/Feature/PeriodsTestCase.php
index 90316d8..0dc5774 100755
--- a/tests/Feature/PeriodsTestCase.php
+++ b/tests/Feature/PeriodsTestCase.php
@@ -92,10 +92,10 @@ public function day_test()
 
 
         //time until redis delete periods
-        $this->assertEquals(1, now()->addSeconds(visits($post)->period('day')->timeLeft())->diffInDays($time));
+        $this->assertEquals(1, intval(abs(now()->addSeconds(visits($post)->period('day')->timeLeft())->diffInDays($time))));
 
         //time until redis delete periods
-        $this->assertEquals(1, now()->addSeconds(visits('Awssat\Visits\Tests\Post')->period('day')->timeLeft())->diffInDays($time));
+        $this->assertEquals(1, intval(abs(now()->addSeconds(visits('Awssat\Visits\Tests\Post')->period('day')->timeLeft())->diffInDays($time))));
     }
 
     /** @test */