diff --git a/InterstellarFuelSwitch/InterstellarFuelSwitch-3.12.0.0.ckan b/InterstellarFuelSwitch/InterstellarFuelSwitch-3.12.0.0.ckan
index 5d0a83f20e..a2a67e647d 100644
--- a/InterstellarFuelSwitch/InterstellarFuelSwitch-3.12.0.0.ckan
+++ b/InterstellarFuelSwitch/InterstellarFuelSwitch-3.12.0.0.ckan
@@ -12,7 +12,7 @@
         "x_screenshot": "https://spacedock.info/content/FreeThinker_517/Interstellar_Fuel_Switch/Interstellar_Fuel_Switch-1481278354.0821617.jpg"
     },
     "version": "3.12.0.0",
-    "ksp_version": "1.8.0",
+    "ksp_version": "1.3.1",
     "depends": [
         {
             "name": "CommunityResourcePack",