diff --git a/source/resource/sounds/1.14.0/sound_definitions.json b/source/resource/sounds/1.14.0/sound_definitions.json
index a3030d4d..ce42e1c5 100644
--- a/source/resource/sounds/1.14.0/sound_definitions.json
+++ b/source/resource/sounds/1.14.0/sound_definitions.json
@@ -16,6 +16,7 @@
     },
     "SoundSpec": {
       "additionalItems": false,
+      "additionalProperties": false,
       "type": "object",
       "$id": "#/Sound",
       "title": "Sound",
diff --git a/source/resource/sounds/sound_definitions_unknown.json b/source/resource/sounds/sound_definitions_unknown.json
index 06c25908..769636eb 100644
--- a/source/resource/sounds/sound_definitions_unknown.json
+++ b/source/resource/sounds/sound_definitions_unknown.json
@@ -15,6 +15,7 @@
     },
     "SoundSpec": {
       "additionalItems": false,
+      "additionalProperties": false,
       "type": "object",
       "$id": "#/Sound",
       "title": "Sound",