diff --git a/SpeedUnitAnnex/SpeedUnitAnnex-1.6.1.ckan b/SpeedUnitAnnex/SpeedUnitAnnex-1.6.1.ckan
index 6e2eb51a79..f3062d07cb 100644
--- a/SpeedUnitAnnex/SpeedUnitAnnex-1.6.1.ckan
+++ b/SpeedUnitAnnex/SpeedUnitAnnex-1.6.1.ckan
@@ -1,5 +1,5 @@
 {
-    "spec_version": "v1.4",
+    "spec_version": 1,
     "identifier": "SpeedUnitAnnex",
     "name": "Speed Unit Annex",
     "abstract": "Add (annex) some new speed unit and helpful values to the navball's top line, depending from a navball mode and a vesselType",