diff --git a/SubstrateCS/Source/Level.cs b/SubstrateCS/Source/Level.cs
index a35b525..671e174 100644
--- a/SubstrateCS/Source/Level.cs
+++ b/SubstrateCS/Source/Level.cs
@@ -161,13 +161,13 @@ namespace Substrate
                 new SchemaNodeScaler("DayTime", TagType.TAG_LONG, SchemaOptions.OPTIONAL),
                 new	SchemaNodeCompound("GameRules")
 			    {			
-				    new	SchemaNodeScaler("commandBlockOutput", TagType.TAG_STRING, SchemaOptions.OPTIONAL),
-				    new	SchemaNodeScaler("doFireTick", TagType.TAG_STRING, SchemaOptions.OPTIONAL),
-				    new	SchemaNodeScaler("doMobLoot", TagType.TAG_STRING, SchemaOptions.OPTIONAL),
-				    new	SchemaNodeScaler("doMobSpawning", TagType.TAG_STRING, SchemaOptions.OPTIONAL),
-				    new	SchemaNodeScaler("doTileDrops", TagType.TAG_STRING, SchemaOptions.OPTIONAL),
-				    new	SchemaNodeScaler("keepInventory", TagType.TAG_STRING, SchemaOptions.OPTIONAL),
-				    new	SchemaNodeScaler("mobGriefing", TagType.TAG_STRING, SchemaOptions.OPTIONAL),
+				    new	SchemaNodeScaler("commandBlockOutput", TagType.TAG_STRING),
+				    new	SchemaNodeScaler("doFireTick", TagType.TAG_STRING),
+				    new	SchemaNodeScaler("doMobLoot", TagType.TAG_STRING),
+				    new	SchemaNodeScaler("doMobSpawning", TagType.TAG_STRING),
+				    new	SchemaNodeScaler("doTileDrops", TagType.TAG_STRING),
+				    new	SchemaNodeScaler("keepInventory", TagType.TAG_STRING),
+				    new	SchemaNodeScaler("mobGriefing", TagType.TAG_STRING),
 			    },
             },
         };
@@ -813,4 +813,4 @@ namespace Substrate
 
         #endregion
     }
-}
+}