diff --git a/MicroTweaks/MicroTweaks-1.0.ckan b/MicroTweaks/MicroTweaks-1.0.ckan
index 80089cd7e9..d51ca045db 100644
--- a/MicroTweaks/MicroTweaks-1.0.ckan
+++ b/MicroTweaks/MicroTweaks-1.0.ckan
@@ -1,5 +1,5 @@
 {
-    "spec_version": "v1.4",
+    "spec_version": 1,
     "identifier": "MicroTweaks",
     "name": "MicroTweaks",
     "abstract": "Tiny mod that changes the cost, mass, thrust etc.  to make the game more realistic.",