diff --git a/project.godot b/project.godot
index 85fb9f5ad..c363c4427 100644
--- a/project.godot
+++ b/project.godot
@@ -333,6 +333,7 @@ config/windows_native_icon="res://assets/graphics/icons/icon.ico"
 config/custom_user_dir_name.X11="pixelorama"
 config/Version="v0.11-dev"
 config/ExtensionsAPI_Version=3
+config/Pxo_Version=2
 
 [audio]
 
diff --git a/src/Classes/Project.gd b/src/Classes/Project.gd
index d572cc9e6..c9a80b817 100644
--- a/src/Classes/Project.gd
+++ b/src/Classes/Project.gd
@@ -318,6 +318,7 @@ func serialize() -> Dictionary:
 
 	var project_data := {
 		"pixelorama_version": Global.current_version,
+		"pxo_version": ProjectSettings.get_setting("application/config/Pxo_Version"),
 		"name": name,
 		"size_x": size.x,
 		"size_y": size.y,