diff --git a/docker/Dockerfile b/docker/Dockerfile
index 62c68e45d..c37b559b1 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -3,9 +3,9 @@ FROM php:7.1-cli
 RUN pecl install xdebug
 
 RUN apt-get update && \
-    apt-get install -y autoconf pkg-config libssl-dev git && \
-    pecl install mongodb git zlib1g-dev && docker-php-ext-enable mongodb && \
-    docker-php-ext-install -j$(nproc) pdo pdo_mysql zip && docker-php-ext-enable xdebug
+    apt-get install -y autoconf pkg-config libssl-dev git zlib1g-dev && \
+    pecl install mongodb && docker-php-ext-enable mongodb && \
+    docker-php-ext-install -j$(nproc) pdo pdo_mysql zip && docker-php-ext-enable xdebug 
 
 RUN curl -sS https://getcomposer.org/installer | php \
     && mv composer.phar /usr/local/bin/ \
diff --git a/src/Jenssegers/Mongodb/Queue/MongoJob.php b/src/Jenssegers/Mongodb/Queue/MongoJob.php
index f1a61cf46..86b44dfcd 100644
--- a/src/Jenssegers/Mongodb/Queue/MongoJob.php
+++ b/src/Jenssegers/Mongodb/Queue/MongoJob.php
@@ -13,7 +13,7 @@ class MongoJob extends DatabaseJob
      */
     public function isReserved()
     {
-        return $this->job->reserved;
+        return $this->job->reserved_at != null;
     }
 
     /**
diff --git a/src/Jenssegers/Mongodb/Queue/MongoQueue.php b/src/Jenssegers/Mongodb/Queue/MongoQueue.php
index e9cd8da9c..b994fb411 100644
--- a/src/Jenssegers/Mongodb/Queue/MongoQueue.php
+++ b/src/Jenssegers/Mongodb/Queue/MongoQueue.php
@@ -70,14 +70,16 @@ protected function getNextAvailableJobAndReserve($queue)
         $job = $this->database->getCollection($this->table)->findOneAndUpdate(
             [
                 'queue' => $this->getQueue($queue),
-                'reserved' => 0,
+                'reserved_at' => null,
                 'available_at' => ['$lte' => Carbon::now()->getTimestamp()],
             ],
             [
                 '$set' => [
-                    'reserved' => 1,
                     'reserved_at' => Carbon::now()->getTimestamp(),
                 ],
+                '$inc' => [
+                    'attempts' => 1,
+                ]
             ],
             [
                 'returnDocument' => FindOneAndUpdate::RETURN_DOCUMENT_AFTER,
@@ -105,20 +107,11 @@ protected function releaseJobsThatHaveBeenReservedTooLong($queue)
 
         $reserved = $this->database->collection($this->table)
             ->where('queue', $this->getQueue($queue))
-            ->where(function ($query) use ($expiration, $now) {
-                // Check for available jobs
-                $query->where(function ($query) use ($now) {
-                    $query->whereNull('reserved_at');
-                    $query->where('available_at', '<=', $now);
-                });
-
-                // Check for jobs that are reserved but have expired
-                $query->orWhere('reserved_at', '<=', $expiration);
-            })->get();
+            ->where('reserved_at', '<=', $expiration)
+            ->get();
 
         foreach ($reserved as $job) {
-            $attempts = $job['attempts'] + 1;
-            $this->releaseJob($job['_id'], $attempts);
+            $this->releaseJob($job['_id']);
         }
     }
 
@@ -129,12 +122,10 @@ protected function releaseJobsThatHaveBeenReservedTooLong($queue)
      * @param  int $attempts
      * @return void
      */
-    protected function releaseJob($id, $attempts)
+    protected function releaseJob($id)
     {
         $this->database->table($this->table)->where('_id', $id)->update([
-            'reserved' => 0,
             'reserved_at' => null,
-            'attempts' => $attempts,
         ]);
     }
 
diff --git a/tests/QueueTest.php b/tests/QueueTest.php
index 35be33f9a..f80a145fa 100644
--- a/tests/QueueTest.php
+++ b/tests/QueueTest.php
@@ -43,7 +43,7 @@ public function testQueueJobExpired()
         Queue::getDatabase()
             ->table(Config::get('queue.connections.database.table'))
             ->where('_id', $id)
-            ->update(['reserved' => 1, 'reserved_at' => $expiry]);
+            ->update(['reserved_at' => $expiry]);
 
         // Expect an attempted older job in the queue
         $job = Queue::pop('test');