diff --git a/src/SelectTree.php b/src/SelectTree.php
index d76f969..8827347 100644
--- a/src/SelectTree.php
+++ b/src/SelectTree.php
@@ -585,7 +585,7 @@ public function getCreateOptionAction(): ?Action
         return $action;
     }
 
-    public function createOptionModalHeading(string | Closure | null $heading): static
+    public function createOptionModalHeading(string|Closure|null $heading): static
     {
         $this->createOptionModalHeading = $heading;