diff --git a/TweakScale/TweakScale-v1.48.ckan b/TweakScale/TweakScale-v1.48.ckan
index d0369489d7..5a0b8063a6 100644
--- a/TweakScale/TweakScale-v1.48.ckan
+++ b/TweakScale/TweakScale-v1.48.ckan
@@ -6,6 +6,7 @@
   "license": "CC-BY-NC-SA-4.0",
   "release_status": "stable",
   "ksp_version_min": "0.25",
+  "ksp_version_max": "0.90",
   "depends": [
     {
       "name": "ModuleManager",
diff --git a/TweakScale/TweakScale-v1.49.ckan b/TweakScale/TweakScale-v1.49.ckan
index b7709db3d4..f2227edda0 100644
--- a/TweakScale/TweakScale-v1.49.ckan
+++ b/TweakScale/TweakScale-v1.49.ckan
@@ -6,6 +6,7 @@
   "license": "CC-BY-NC-SA-4.0",
   "release_status": "stable",
   "ksp_version_min": "0.25",
+  "ksp_version_max": "0.90",
   "depends": [
     {
       "name": "ModuleManager",
diff --git a/TweakScale/TweakScale-v1.50.ckan b/TweakScale/TweakScale-v1.50.ckan
index 46d8f1cb06..83b16cde96 100644
--- a/TweakScale/TweakScale-v1.50.ckan
+++ b/TweakScale/TweakScale-v1.50.ckan
@@ -6,6 +6,7 @@
     "license": "CC-BY-NC-SA-4.0",
     "release_status": "stable",
     "ksp_version_min": "0.25",
+    "ksp_version_max": "0.90",
     "depends": [
         {
             "name": "ModuleManager",