diff --git a/app/Jobs/ApplicationDeploymentJob.php b/app/Jobs/ApplicationDeploymentJob.php
index 591159c5f..4f9481794 100644
--- a/app/Jobs/ApplicationDeploymentJob.php
+++ b/app/Jobs/ApplicationDeploymentJob.php
@@ -956,7 +956,7 @@ private function deploy_nixpacks_buildpack()
         $this->rolling_update();
     }
 
-    private function deploy_railpack_buildpack()
+    private function deploy_railpack_buildpack(): void
     {
         if ($this->use_build_server) {
             $this->server = $this->build_server;