diff --git a/mappings/net/minecraft/world/updater/WorldUpdater.mapping b/mappings/net/minecraft/world/updater/WorldUpdater.mapping
index 3951d5c158..7515fa38ca 100644
--- a/mappings/net/minecraft/world/updater/WorldUpdater.mapping
+++ b/mappings/net/minecraft/world/updater/WorldUpdater.mapping
@@ -21,10 +21,19 @@ CLASS net/minecraft/class_1257 net/minecraft/world/updater/WorldUpdater
 		ARG 2 dataFixer
 		ARG 3 worlds
 		ARG 4 eraseCache
+	METHOD method_17829 (Ljava/io/File;Ljava/lang/String;)Z
+		ARG 0 directory
+		ARG 1 name
 	METHOD method_17830 getChunkPositions (Lnet/minecraft/class_5321;)Ljava/util/List;
+		ARG 1 world
+	METHOD method_28304 getWorlds ()Lcom/google/common/collect/ImmutableSet;
 	METHOD method_5393 getProgress (Lnet/minecraft/class_5321;)F
+		ARG 1 world
 	METHOD method_5394 getStatus ()Lnet/minecraft/class_2561;
 	METHOD method_5397 getTotalChunkCount ()I
+	METHOD method_5398 (Ljava/lang/Thread;Ljava/lang/Throwable;)V
+		ARG 1 thread
+		ARG 2 throwable
 	METHOD method_5399 getSkippedChunkCount ()I
 	METHOD method_5400 getUpgradedChunkCount ()I
 	METHOD method_5401 getProgress ()F