diff --git a/public_html/deployment/plugins/rollout/ssh/rollout_ssh.php b/public_html/deployment/plugins/rollout/ssh/rollout_ssh.php
index 012fe813de13bf416271e4fb693f5ac941797a92..8ebac30a9a5abf83792344c85c66bddadfd74ae5 100644
--- a/public_html/deployment/plugins/rollout/ssh/rollout_ssh.php
+++ b/public_html/deployment/plugins/rollout/ssh/rollout_ssh.php
@@ -12,18 +12,19 @@ class rollout_ssh extends rollout_base {
 
     /**
      * check requirements if the plugin could work
+     * @return array
      */
-    public function checkRequirements() {
-        // no specific checks needed ... always true
-        return true;
+    public function checkRequirements(): array {
+        // no specific checks needed ... always empty
+        return [];
     }
 
     /**
      * check access to a deploy target
      */
     public function checkConnectionToTarget() {
-        // do nothing ... always true
-        return true;
+        // do nothing ... always empty
+        return [];
     }
 
     /**