diff --git a/config/queue.php b/config/queue.php
index 714d91ee8..116bd8d00 100644
--- a/config/queue.php
+++ b/config/queue.php
@@ -39,7 +39,7 @@ return [
             'connection' => env('DB_QUEUE_CONNECTION'),
             'table' => env('DB_QUEUE_TABLE', 'jobs'),
             'queue' => env('DB_QUEUE', 'default'),
-            'retry_after' => env('DB_QUEUE_RETRY_AFTER', 90),
+            'retry_after' => (int) env('DB_QUEUE_RETRY_AFTER', 90),
             'after_commit' => false,
         ],
 
@@ -47,7 +47,7 @@ return [
             'driver' => 'beanstalkd',
             'host' => env('BEANSTALKD_QUEUE_HOST', 'localhost'),
             'queue' => env('BEANSTALKD_QUEUE', 'default'),
-            'retry_after' => env('BEANSTALKD_QUEUE_RETRY_AFTER', 90),
+            'retry_after' => (int) env('BEANSTALKD_QUEUE_RETRY_AFTER', 90),
             'block_for' => 0,
             'after_commit' => false,
         ],
@@ -67,7 +67,7 @@ return [
             'driver' => 'redis',
             'connection' => env('REDIS_QUEUE_CONNECTION', 'default'),
             'queue' => env('REDIS_QUEUE', 'default'),
-            'retry_after' => env('REDIS_QUEUE_RETRY_AFTER', 90),
+            'retry_after' => (int) env('REDIS_QUEUE_RETRY_AFTER', 90),
             'block_for' => null,
             'after_commit' => false,
         ],