diff --git a/index.js b/index.js
index 35fd10a..9083321 100644
--- a/index.js
+++ b/index.js
@@ -25,7 +25,7 @@ module.exports = function (input, callback) {
     };
 
     // First unpack the input (need this outside of the async waterfall so that
-    // unoackedProject can be refered to again)
+    // unpackedProject can be refered to again)
     unpack(input, function(err, unpackedProject) {
         if (err) {
             return callback(err);
diff --git a/lib/sb3_schema.json b/lib/sb3_schema.json
index cece94a..358f4d2 100644
--- a/lib/sb3_schema.json
+++ b/lib/sb3_schema.json
@@ -32,9 +32,6 @@
                 },
                 "rotationCenterY": {
                     "type": "number"
-                },
-                "skinId": {
-                    "type": "integer"
                 }
             },
             "required": [
@@ -69,9 +66,6 @@
                 },
                 "sampleCount": {
                     "type": "integer"
-                },
-                "soundID": {
-                    "type": "integer"
                 }
             },
             "required": [