diff --git a/gradle.properties b/gradle.properties
index 95ff9731..e1435648 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,10 +4,10 @@ org.gradle.jvmargs=-Xmx1G
 # Fabric Properties
 	# check these on https://fabricmc.net/use
     # or better: https://modmuss50.me/fabric.html
-	minecraft_version=21w08a
-	yarn_mappings=21w08a+build.1
+	minecraft_version=21w08b
+	yarn_mappings=21w08b+build.17
 	loader_version=0.11.2
-	fabric_version=0.31.1+1.17
+	fabric_version=0.31.2+1.17
 
 # Mod Properties
 	mod_version = 1.4.28
diff --git a/src/main/java/carpet/mixins/ServerChunkManagerMixin.java b/src/main/java/carpet/mixins/ServerChunkManagerMixin.java
index c8bfcd21..3f2edb09 100644
--- a/src/main/java/carpet/mixins/ServerChunkManagerMixin.java
+++ b/src/main/java/carpet/mixins/ServerChunkManagerMixin.java
@@ -77,7 +77,7 @@ public abstract class ServerChunkManagerMixin implements ServerChunkManagerInter
                 int spawnTries = SpawnReporter.spawn_tries.get(cat);
                 if (!SpawnReporter.local_spawns.containsKey(cat))
                 {
-                    if (!cat.isAnimal() || boolean_3)
+                    if (!cat.isRare() || boolean_3) // isAnimal
                     {
                         // fill mobcaps for that category so spawn got cancelled
                         SpawnReporter.spawn_ticks_full.put(key,
diff --git a/src/main/java/carpet/mixins/SpawnHelperMixin.java b/src/main/java/carpet/mixins/SpawnHelperMixin.java
index b4d5100d..61347721 100644
--- a/src/main/java/carpet/mixins/SpawnHelperMixin.java
+++ b/src/main/java/carpet/mixins/SpawnHelperMixin.java
@@ -279,7 +279,7 @@ public class SpawnHelperMixin
 
             for(int var8 = 0; var8 < var7; ++var8) {
                 SpawnGroup entityCategory = var6[var8];
-                if ((spawnAnimals || !entityCategory.isPeaceful()) && (spawnMonsters || entityCategory.isPeaceful()) && (shouldSpawnAnimals || !entityCategory.isAnimal()) )
+                if ((spawnAnimals || !entityCategory.isPeaceful()) && (spawnMonsters || entityCategory.isPeaceful()) && (shouldSpawnAnimals || !entityCategory.isRare()) )
                 {
                     RegistryKey<World> dim = world.getRegistryKey(); // getDimensionType;
                     int newCap = (int) ((double)entityCategory.getCapacity()*(Math.pow(2.0,(SpawnReporter.mobcap_exponent/4))));
diff --git a/src/main/java/carpet/patches/EntityPlayerMPFake.java b/src/main/java/carpet/patches/EntityPlayerMPFake.java
index 895eca83..c682d437 100644
--- a/src/main/java/carpet/patches/EntityPlayerMPFake.java
+++ b/src/main/java/carpet/patches/EntityPlayerMPFake.java
@@ -75,7 +75,7 @@ public class EntityPlayerMPFake extends ServerPlayerEntity
 
 
         server.getPlayerManager().sendToDimension(new EntitySetHeadYawS2CPacket(playerShadow, (byte) (player.headYaw * 256 / 360)), playerShadow.world.getRegistryKey());
-        server.getPlayerManager().sendToAll(new PlayerListS2CPacket(PlayerListS2CPacket.class_5893.field_29136, playerShadow));
+        server.getPlayerManager().sendToAll(new PlayerListS2CPacket(PlayerListS2CPacket.class_5893.ADD_PLAYER, playerShadow));
         player.getServerWorld().getChunkManager().updateCameraPosition(playerShadow);
         return playerShadow;
     }
diff --git a/src/main/java/carpet/script/api/Auxiliary.java b/src/main/java/carpet/script/api/Auxiliary.java
index fb2f5160..2fcfee47 100644
--- a/src/main/java/carpet/script/api/Auxiliary.java
+++ b/src/main/java/carpet/script/api/Auxiliary.java
@@ -36,11 +36,6 @@ import carpet.script.value.Value;
 import carpet.script.value.ValueConversions;
 import carpet.utils.Messenger;
 import net.minecraft.block.BlockState;
-import net.minecraft.class_5888;
-import net.minecraft.class_5894;
-import net.minecraft.class_5903;
-import net.minecraft.class_5904;
-import net.minecraft.class_5905;
 import net.minecraft.command.DataCommandStorage;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityType;
@@ -53,9 +48,14 @@ import net.minecraft.nbt.NbtHelper;
 import net.minecraft.nbt.StringTag;
 import net.minecraft.nbt.Tag;
 import net.minecraft.network.Packet;
+import net.minecraft.network.packet.s2c.play.ClearTitleS2CPacket;
+import net.minecraft.network.packet.s2c.play.OverlayMessageS2CPacket;
 import net.minecraft.network.packet.s2c.play.PlaySoundIdS2CPacket;
 //import net.minecraft.network.packet.s2c.play.TitleS2CPacket;
 //import net.minecraft.network.packet.s2c.play.TitleS2CPacket.Action;
+import net.minecraft.network.packet.s2c.play.SubtitleS2CPacket;
+import net.minecraft.network.packet.s2c.play.TitleFadeS2CPacket;
+import net.minecraft.network.packet.s2c.play.TitleS2CPacket;
 import net.minecraft.particle.ParticleEffect;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.command.ServerCommandSource;
@@ -520,28 +520,28 @@ public class Auxiliary {
             switch (lv.get(1).evalValue(c).getString().toLowerCase(Locale.ROOT))
             {
                 case "title":
-                    packetGetter = (x) -> new class_5904(x);
+                    packetGetter = TitleS2CPacket::new;
                     //action = Action.TITLE;
                     if (lv.size() < 3)
                         throw new InternalExpressionException("Third argument of 'display_title' must be present except for 'clear' type");
 
                     break;
                 case "subtitle":
-                    packetGetter = (x) -> new class_5903(x);
+                    packetGetter = SubtitleS2CPacket::new;
                     if (lv.size() < 3)
                         throw new InternalExpressionException("Third argument of 'display_title' must be present except for 'clear' type");
 
                     //action = Action.SUBTITLE;
                     break;
                 case "actionbar":
-                    packetGetter = (x) -> new class_5894(x);
+                    packetGetter = OverlayMessageS2CPacket::new;
                     if (lv.size() < 3)
                         throw new InternalExpressionException("Third argument of 'display_title' must be present except for 'clear' type");
 
                     //action = Action.ACTIONBAR;
                     break;
                 case "clear":
-                    packetGetter = (x) -> new class_5888(true); // resetting default fade
+                    packetGetter = (x) -> new ClearTitleS2CPacket(true); // resetting default fade
                     //action = Action.CLEAR;
                     break;
                 default:
@@ -558,13 +558,13 @@ public class Auxiliary {
                 else
                     title = new LiteralText(pVal.getString());
             }
-            class_5905 timesPacket; // TimesPacket
+            TitleFadeS2CPacket timesPacket; // TimesPacket
             if (lv.size() > 3)
             {
                 int in = NumericValue.asNumber(lv.get(3).evalValue(c),"fade in for display_title" ).getInt();
                 int stay = NumericValue.asNumber(lv.get(4).evalValue(c),"stay for display_title" ).getInt();
                 int out = NumericValue.asNumber(lv.get(5).evalValue(c),"fade out for display_title" ).getInt();
-                timesPacket = new class_5905(in, stay, out);
+                timesPacket = new TitleFadeS2CPacket(in, stay, out);
                 //timesPacket = new TitleS2CPacket(Action.TIMES, null, in, stay, out);
             }
             else timesPacket = null;