diff --git a/SimplexPropulsion/SimplexPropulsion-1-2.1.ckan b/SimplexPropulsion/SimplexPropulsion-1-2.1.ckan
index f048ca0e8e..5f29f2b37b 100644
--- a/SimplexPropulsion/SimplexPropulsion-1-2.1.ckan
+++ b/SimplexPropulsion/SimplexPropulsion-1-2.1.ckan
@@ -1,5 +1,5 @@
 {
-    "spec_version": "v1.4",
+    "spec_version": "v1.10",
     "identifier": "SimplexPropulsion",
     "name": "SIMPLEX Propulsion",
     "abstract": "Adjusts engine atmospheric performance to give a more unique playthrough.",