diff --git a/OptionalAtm/OptionalAtm-1.4.9.1.ckan b/OptionalAtm/OptionalAtm-1.4.9.1.ckan
index cb2acd2d15..15a27ee164 100644
--- a/OptionalAtm/OptionalAtm-1.4.9.1.ckan
+++ b/OptionalAtm/OptionalAtm-1.4.9.1.ckan
@@ -17,7 +17,7 @@
     },
     "version": "1.4.9.1",
     "ksp_version_min": "1.3",
-    "ksp_version_max": "1.3.1",
+    "ksp_version_max": "1.3.0",
     "depends": [
         {
             "name": "Kopernicus",