diff --git a/src/Schema/NavigationProperty.php b/src/Schema/NavigationProperty.php
index e18029b..9f26d87 100644
--- a/src/Schema/NavigationProperty.php
+++ b/src/Schema/NavigationProperty.php
@@ -68,6 +68,11 @@ public function convert($value, Builder $query)
                 $expands = $expands->getExpands();
             }
 
+            if(!is_array($expands) )
+            {
+                $expands = [$expands];
+            }
+
             $query->navigateTo($this->name)
                   ->setExpands($expands ?? []);