diff --git a/sandbox_probe/project.godot b/sandbox_probe/project.godot
index 4731f05..79c5ba9 100644
--- a/sandbox_probe/project.godot
+++ b/sandbox_probe/project.godot
@@ -4,5 +4,5 @@ config_version=5
 [application]
 
 config/name="sandbox_probe"
-run/main_scene="res://probe6.gd"
+run/main_scene="res://probe6.tscn"
 config/features=PackedStringArray("4.6")