diff --git a/VollmetallAlternativePropulsionSystem/VollmetallAlternativePropulsionSystem-3.1.ckan b/VollmetallAlternativePropulsionSystem/VollmetallAlternativePropulsionSystem-3.1.ckan
index 1d7bca74b9..cfc7c03121 100644
--- a/VollmetallAlternativePropulsionSystem/VollmetallAlternativePropulsionSystem-3.1.ckan
+++ b/VollmetallAlternativePropulsionSystem/VollmetallAlternativePropulsionSystem-3.1.ckan
@@ -1,5 +1,5 @@
 {
-    "spec_version": "v1.18",
+    "spec_version": "v1.4",
     "identifier": "VollmetallAlternativePropulsionSystem",
     "name": "VM Vollmetall Alternative Propulsion System",
     "abstract": "adds alternative propulsion system to make a more sci fi aproach in flyng (fly like in the expanse. without the need of infinite fuel cheats), needs B9 Part Switch",