diff --git a/src/NpmStats.php b/src/NpmStats.php
index 381520e..c9cc361 100644
--- a/src/NpmStats.php
+++ b/src/NpmStats.php
@@ -11,11 +11,11 @@ class NpmStats
     /** @var string */
     protected $baseUrl;
 
-    const LAST_DAY = "last-day";
-    const LAST_WEEK = "last-week";
-    const LAST_MONTH = "last-month";
-    const LAST_YEAR = "last-year";
-    const TOTAL = "total";
+    const LAST_DAY = 'last-day';
+    const LAST_WEEK = 'last-week';
+    const LAST_MONTH = 'last-month';
+    const LAST_YEAR = 'last-year';
+    const TOTAL = 'total';
 
     /**
      * @param \GuzzleHttp\Client $client
@@ -32,7 +32,7 @@ public function __construct(Client $client, $baseUrl = 'https://api.npmjs.org/do
      * @param string $pointValue
      * @return array
      */
-    private function getStatsByPoint($packageName, $pointValue = "last-day")
+    private function getStatsByPoint($packageName, $pointValue = 'last-day')
     {
         return $this->makeRequest("/point/{$pointValue}/{$packageName}");
     }
@@ -42,7 +42,7 @@ private function getStatsByPoint($packageName, $pointValue = "last-day")
      * @param string $rangeValue
      * @return array
      */
-    private function getStatsByRange($packageName, $rangeValue = "last-day")
+    private function getStatsByRange($packageName, $rangeValue = 'last-day')
     {
         return $this->makeRequest("/range/{$rangeValue}/{$packageName}");
     }
@@ -54,7 +54,7 @@ private function getStatsByRange($packageName, $rangeValue = "last-day")
      * @return array
      * @throws \Exception
      */
-    public function getStats($packageName, $period = "last-day", $asRange = false)
+    public function getStats($packageName, $period = 'last-day', $asRange = false)
     {
         if (empty($packageName)) {
             throw new \Exception("Package name can't be empty");
@@ -69,7 +69,6 @@ public function getStats($packageName, $period = "last-day", $asRange = false)
         return $this->getStatsByPoint($packageName, $period);
     }
 
-
     /**
      * @param string $resource
      * @param array $query
@@ -89,14 +88,12 @@ private function makeRequest($resource, array $query = [])
     private function replaceSpecialPeriodsIfApplicable(&$period)
     {
         if ($period === self::TOTAL) {
-            $currentDate = (new \DateTime)->format("Y-m-d");
+            $currentDate = (new \DateTime)->format('Y-m-d');
             $period = "2015-01-01:{$currentDate}";
-        } else if ($period === self::LAST_YEAR) {
-            $currentDate = (new \DateTime)->format("Y-m-d");
-            $beforeDate = (new \DateTime)->modify("-365 days")->format("Y-m-d");
+        } elseif ($period === self::LAST_YEAR) {
+            $currentDate = (new \DateTime)->format('Y-m-d');
+            $beforeDate = (new \DateTime)->modify('-365 days')->format('Y-m-d');
             $period = "{$beforeDate}:{$currentDate}";
         }
-
-        return;
     }
-}
\ No newline at end of file
+}
diff --git a/tests/NpmStatsTest.php b/tests/NpmStatsTest.php
index b5ede77..17973f6 100644
--- a/tests/NpmStatsTest.php
+++ b/tests/NpmStatsTest.php
@@ -12,7 +12,7 @@ class NpmStatsTest extends TestCase
     /** @var \Developmint\NpmStats\NpmStats */
     protected $npmStats;
 
-    public function setUp() : void
+    public function setUp(): void
     {
         $client = new Client();
 
@@ -30,7 +30,7 @@ public function testItCanRetrievePointStats()
         $this->assertArrayHasKey('downloads', $result);
         $this->assertArrayHasKey('start', $result);
         $this->assertArrayHasKey('end', $result);
-        $this->assertEquals($packageName, $result["package"]);
+        $this->assertEquals($packageName, $result['package']);
     }
 
     public function testItCanRetrievePointBulkStats()
@@ -51,10 +51,10 @@ public function testItCanRetrieveRangeStats()
 
         $this->assertArrayHasKey('start', $result);
         $this->assertArrayHasKey('end', $result);
-        $this->assertEquals($packageName, $result["package"]);
+        $this->assertEquals($packageName, $result['package']);
         $this->assertArrayHasKey('downloads', $result);
-        $this->assertArrayHasKey('downloads', $result["downloads"][0]);
-        $this->assertArrayHasKey('day', $result["downloads"][0]);
+        $this->assertArrayHasKey('downloads', $result['downloads'][0]);
+        $this->assertArrayHasKey('day', $result['downloads'][0]);
     }
 
     public function testItCanRetrieveYearlyStats()
@@ -63,11 +63,10 @@ public function testItCanRetrieveYearlyStats()
         $result = $this->npmStats->getStats($packageName, NpmStats::LAST_YEAR);
         $this->assertArrayHasKey('start', $result);
         $this->assertArrayHasKey('end', $result);
-        $this->assertEquals((new \DateTime)->modify("-365 days")->format("Y-m-d"), $result["start"]);
+        $this->assertEquals((new \DateTime)->modify('-365 days')->format('Y-m-d'), $result['start']);
 
-        $this->assertEquals($packageName, $result["package"]);
+        $this->assertEquals($packageName, $result['package']);
         $this->assertArrayHasKey('downloads', $result);
-
     }
 
     public function testItCanRetrieveYearlyStatsForBulk()
@@ -84,7 +83,7 @@ public function testItCanRetrieveAllTimeStats()
         $result = $this->npmStats->getStats($packageName, NpmStats::TOTAL);
         $this->assertArrayHasKey('start', $result);
         $this->assertArrayHasKey('end', $result);
-        $this->assertEquals($packageName, $result["package"]);
+        $this->assertEquals($packageName, $result['package']);
         $this->assertArrayHasKey('downloads', $result);
     }