diff --git a/src/main/kotlin/com/enginemachiner/harmony/ModAdvancement.kt b/src/main/kotlin/com/enginemachiner/harmony/ModAdvancement.kt
index 69de2de..8a57edb 100644
--- a/src/main/kotlin/com/enginemachiner/harmony/ModAdvancement.kt
+++ b/src/main/kotlin/com/enginemachiner/harmony/ModAdvancement.kt
@@ -33,13 +33,16 @@ abstract class ModAdvancement : ModID {
 
     fun build( consumer: Consumer<AdvancementEntry>, criterion: String = name ): AdvancementEntry {
 
-        val advancement = Advancement.Builder.create()
+        val task = Advancement.Task.create()
             .display( icon, title(), description(), background, frame, toast, announce, hidden )
-            .parent( parent?.advancement ).criterion( criterion, conditions() )
-            .build( consumer, "$MOD_NAME/$name" )
+            .criterion( criterion, conditions() )
+
+        if ( parent != null ) task.parent( parent!!.advancement )
+
+        val advancement = task.build( consumer, "$MOD_NAME/$name" )
 
         this.advancement = advancement;         return advancement
 
     }
 
-}
\ No newline at end of file
+}