diff --git a/composer.json b/composer.json
index bcb58ab..d91f9e3 100644
--- a/composer.json
+++ b/composer.json
@@ -53,7 +53,7 @@
     "require-dev": {
         "phpunit/phpunit": "^8.4",
         "aws/aws-sdk-php": "^3.0@dev",
-        "google/cloud-storage": "dev-master",
+        "google/cloud-storage": "dev-main",
         "microsoft/azure-storage-blob": "dev-master"
     },
     "autoload-dev": {
diff --git a/src/AutoReps.php b/src/AutoReps.php
index b704928..63aa200 100644
--- a/src/AutoReps.php
+++ b/src/AutoReps.php
@@ -16,6 +16,7 @@
 use FFMpeg\Format\VideoInterface;
 use Streaming\Exception\InvalidArgumentException;
 use Streaming\Exception\RuntimeException;
+use Traversable;
 
 
 class AutoReps implements \IteratorAggregate
@@ -93,7 +94,7 @@ private function getKiloBitRate(): int
             return intval(($this->original_format->get('bit_rate') / 1024) * .9);
         }
 
-        return (int)$this->video->get('bit_rate') / 1024;
+        return intval($this->video->get('bit_rate') / 1024);
     }
 
     /**
@@ -231,7 +232,7 @@ public function getKBitrate(): array
      * Retrieve an external iterator reps
      * @return \Traversable An instance of an object implementing <b>Iterator</b> or <b>Traversable</b>
      */
-    public function getIterator()
+    public function getIterator(): Traversable
     {
         $reps = $this->getCalculatedReps();
         array_push($reps, $this->getOriginalRep());
diff --git a/src/RepsCollection.php b/src/RepsCollection.php
index ada2ef3..11a7990 100644
--- a/src/RepsCollection.php
+++ b/src/RepsCollection.php
@@ -98,7 +98,7 @@ public function count(): int
     /**
      * {@inheritdoc}
      */
-    public function getIterator()
+    public function getIterator(): \Traversable
     {
         return new \ArrayIterator($this->representations);
     }
diff --git a/src/Stream.php b/src/Stream.php
index 5b9e133..d13b55d 100644
--- a/src/Stream.php
+++ b/src/Stream.php
@@ -189,7 +189,7 @@ public function metadata(): Metadata
     public function __destruct()
     {
         // make sure that FFmpeg process has benn terminated
-        sleep(.5);
+        sleep(1);
         File::remove($this->tmp_dir);
 
         if ($this->media->isTmp()) {