diff --git a/MusicMuteContinued/MusicMuteContinued-1.1.3.ckan b/MusicMuteContinued/MusicMuteContinued-1.1.3.ckan
index eb4e4b5619..50df958c67 100644
--- a/MusicMuteContinued/MusicMuteContinued-1.1.3.ckan
+++ b/MusicMuteContinued/MusicMuteContinued-1.1.3.ckan
@@ -1,5 +1,5 @@
 {
-    "spec_version": "v1.4",
+    "spec_version": "v1.16",
     "identifier": "MusicMuteContinued",
     "name": "MusicMute",
     "abstract": "A simple mod that toggles the game's music with a hotkey.",
@@ -10,7 +10,9 @@
         "repository": "https://github.com/nimobeeren/MusicMute"
     },
     "version": "1.1.3",
-    "ksp_version": "1.2",
+    "ksp_version_min": "1.2",
+    "ksp_version_max": "1.3",
+    "ksp_version_strict": false,
     "install": [
         {
             "find": "GameData/MusicMute",