diff --git a/gradle.properties b/gradle.properties
index d8d1711b..a03db307 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,7 +3,7 @@ org.gradle.daemon=false
 
 mod_id=sophisticatedbackpacks
 mod_group_id=sophisticatedbackpacks
-mod_version=3.21.1
+mod_version=3.21.2
 sonar_project_key=sophisticatedbackpacks:SophisticatedBackpacks
 github_package_url=https://maven.pkg.github.com/P3pp3rF1y/SophisticatedBackpacks
 
@@ -31,5 +31,5 @@ crafting_tweaks_cf_file_id=4596466
 chipped_cf_file_id=5077656
 resourcefullib_cf_file_id=5070629
 athena_cf_file_id=4764357
-sc_version=[1.20.1-1.0.4,1.20.4)
+sc_version=[1.20.1-1.0.5,1.20.4)
 parchment_version=2023.09.03-1.20.1
\ No newline at end of file
diff --git a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/backpack/BackpackBlockEntity.java b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/backpack/BackpackBlockEntity.java
index 30ad767a..b89fbdf9 100644
--- a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/backpack/BackpackBlockEntity.java
+++ b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/backpack/BackpackBlockEntity.java
@@ -58,7 +58,7 @@ public BackpackBlockEntity(BlockPos pos, BlockState state) {
 
 	public void setBackpack(ItemStack backpack) {
 		backpackWrapper = backpack.getCapability(CapabilityBackpackWrapper.getCapabilityInstance()).orElse(IBackpackWrapper.Noop.INSTANCE);
-		backpackWrapper.setSaveHandler(() -> {
+		backpackWrapper.setContentsChangeHandler(() -> {
 			setChanged();
 			updateBlockRender = false;
 			WorldHelper.notifyBlockUpdate(this);
diff --git a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/backpack/wrapper/BackpackWrapper.java b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/backpack/wrapper/BackpackWrapper.java
index aa8acfc7..10c7ee6e 100644
--- a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/backpack/wrapper/BackpackWrapper.java
+++ b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/backpack/wrapper/BackpackWrapper.java
@@ -95,7 +95,7 @@ public BackpackWrapper(ItemStack backpack) {
 	}
 
 	@Override
-	public void setSaveHandler(Runnable saveHandler) {
+	public void setContentsChangeHandler(Runnable saveHandler) {
 		backpackSaveHandler = saveHandler;
 		refreshInventoryForUpgradeProcessing();
 	}
diff --git a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/common/gui/BackpackContainer.java b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/common/gui/BackpackContainer.java
index 406fdfdb..1d772062 100644
--- a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/common/gui/BackpackContainer.java
+++ b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/common/gui/BackpackContainer.java
@@ -6,6 +6,7 @@
 import net.minecraft.network.chat.Component;
 import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.world.SimpleMenuProvider;
+import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.inventory.Slot;
@@ -57,6 +58,11 @@ public Optional<BlockPos> getBlockPosition() {
 		return Optional.empty();
 	}
 
+	@Override
+	public Optional<Entity> getEntity() {
+		return Optional.of(player);
+	}
+
 	@Override
 	protected void sendStorageSettingsToClient() {
 		if (player.level().isClientSide) {
diff --git a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/network/SBPPacketHandler.java b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/network/SBPPacketHandler.java
index 2c3d27ac..bfb32323 100644
--- a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/network/SBPPacketHandler.java
+++ b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/network/SBPPacketHandler.java
@@ -6,7 +6,7 @@
 public class SBPPacketHandler extends PacketHandler {
 	public static final SBPPacketHandler INSTANCE = new SBPPacketHandler(SophisticatedBackpacks.MOD_ID);
 
-	public SBPPacketHandler(String modId) {
+	private SBPPacketHandler(String modId) {
 		super(modId);
 	}
 
diff --git a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/upgrades/refill/RefillUpgradeWrapper.java b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/upgrades/refill/RefillUpgradeWrapper.java
index 28faa58a..153da34e 100644
--- a/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/upgrades/refill/RefillUpgradeWrapper.java
+++ b/src/main/java/net/p3pp3rf1y/sophisticatedbackpacks/upgrades/refill/RefillUpgradeWrapper.java
@@ -7,7 +7,7 @@
 import net.minecraft.network.chat.Component;
 import net.minecraft.util.StringRepresentable;
 import net.minecraft.world.InteractionHand;
-import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.Level;
@@ -86,7 +86,7 @@ public FilterLogic getFilterLogic() {
 	}
 
 	@Override
-	public void tick(@Nullable LivingEntity entity, Level world, BlockPos pos) {
+	public void tick(@Nullable Entity entity, Level world, BlockPos pos) {
 		if (entity == null /*not supported in block form*/ || isInCooldown(world)) {
 			return;
 		}
@@ -99,7 +99,7 @@ public void tick(@Nullable LivingEntity entity, Level world, BlockPos pos) {
 		setCooldown(world, COOLDOWN);
 	}
 
-	private void tryRefillFilter(@Nonnull LivingEntity entity, IItemHandler playerInvHandler, ItemStack filter, TargetSlot targetSlot) {
+	private void tryRefillFilter(@Nonnull Entity entity, IItemHandler playerInvHandler, ItemStack filter, TargetSlot targetSlot) {
 		if (!(entity instanceof Player player)) {
 			return;
 		}