diff --git a/CollisionFX/CollisionFX-v4.0.ckan b/CollisionFX/CollisionFX-v4.0.ckan
index 2756adaec9..2df22bf756 100644
--- a/CollisionFX/CollisionFX-v4.0.ckan
+++ b/CollisionFX/CollisionFX-v4.0.ckan
@@ -11,7 +11,7 @@
     },
     "version": "v4.0",
     "ksp_version_min": "1.2.0",
-    "ksp_version_max": "1.3.99",
+    "ksp_version_max": "1.2.99",
     "depends": [
         {
             "name": "ModuleManager"