diff --git a/Spectra/Spectra-v1.6.5.ckan b/Spectra/Spectra-v1.6.5.ckan
index 6b1fd53bd6..42b38c809d 100644
--- a/Spectra/Spectra-v1.6.5.ckan
+++ b/Spectra/Spectra-v1.6.5.ckan
@@ -7,7 +7,7 @@
     "author": "Avera9eJoe",
     "version": "v1.6.5",
     "ksp_version_min": "1.3.0",
-    "ksp_version_max": "1.12.99",
+    "ksp_version_max": "1.12.3",
     "license": "MIT",
     "release_status": "stable",
     "resources": {