diff --git a/RealSolarSystem/RealSolarSystem-v18.1.3.ckan b/RealSolarSystem/RealSolarSystem-v18.1.3.ckan
index 52304e84f6..e424741ac9 100644
--- a/RealSolarSystem/RealSolarSystem-v18.1.3.ckan
+++ b/RealSolarSystem/RealSolarSystem-v18.1.3.ckan
@@ -11,7 +11,7 @@
     ],
     "version": "v18.1.3",
     "ksp_version_min": "1.8.1",
-    "ksp_version_max": "1.8.99",
+    "ksp_version_max": "1.9.99",
     "license": "CC-BY-NC-SA",
     "release_status": "stable",
     "resources": {