diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/ArmorForge.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/ArmorForge.java
index 3210f7424..56c6674b6 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/ArmorForge.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/ArmorForge.java
@@ -4,7 +4,6 @@ import java.util.List;
 
 import javax.annotation.ParametersAreNonnullByDefault;
 
-import io.github.thebusybiscuit.cscorelib2.inventory.InvUtils;
 import org.bukkit.Material;
 import org.bukkit.Sound;
 import org.bukkit.block.Block;
@@ -16,6 +15,7 @@ import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
 
 import io.github.thebusybiscuit.cscorelib2.inventory.ItemUtils;
+import io.github.thebusybiscuit.cscorelib2.inventory.InvUtils;
 import io.github.thebusybiscuit.cscorelib2.item.CustomItem;
 import io.github.thebusybiscuit.slimefun4.implementation.SlimefunPlugin;
 import io.github.thebusybiscuit.slimefun4.utils.SlimefunUtils;
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/Compressor.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/Compressor.java
index f1363dc01..0737eee07 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/Compressor.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/Compressor.java
@@ -5,7 +5,6 @@ import java.util.stream.Collectors;
 
 import javax.annotation.ParametersAreNonnullByDefault;
 
-import io.github.thebusybiscuit.cscorelib2.inventory.InvUtils;
 import org.bukkit.Material;
 import org.bukkit.Sound;
 import org.bukkit.block.Block;
@@ -17,6 +16,7 @@ import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
 
 import io.github.thebusybiscuit.cscorelib2.item.CustomItem;
+import io.github.thebusybiscuit.cscorelib2.inventory.InvUtils;
 import io.github.thebusybiscuit.slimefun4.core.multiblocks.MultiBlockMachine;
 import io.github.thebusybiscuit.slimefun4.implementation.SlimefunItems;
 import io.github.thebusybiscuit.slimefun4.implementation.SlimefunPlugin;
@@ -87,6 +87,7 @@ public class Compressor extends MultiBlockMachine {
         }
     }
 
+    @ParametersAreNonnullByDefault
     private void craft(Player p, ItemStack output, Inventory outputInv, Dispenser dispenser) {
         for (int i = 0; i < 4; i++) {
             int j = i;
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/MagicWorkbench.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/MagicWorkbench.java
index 71a1dbb2d..121d1b0bf 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/MagicWorkbench.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/MagicWorkbench.java
@@ -4,7 +4,6 @@ import java.util.List;
 
 import javax.annotation.ParametersAreNonnullByDefault;
 
-import io.github.thebusybiscuit.cscorelib2.inventory.InvUtils;
 import org.bukkit.Effect;
 import org.bukkit.Material;
 import org.bukkit.Sound;
@@ -17,6 +16,7 @@ import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
 
 import io.github.thebusybiscuit.cscorelib2.item.CustomItem;
+import io.github.thebusybiscuit.cscorelib2.inventory.InvUtils;
 import io.github.thebusybiscuit.slimefun4.implementation.SlimefunPlugin;
 import io.github.thebusybiscuit.slimefun4.implementation.items.backpacks.SlimefunBackpack;
 import io.github.thebusybiscuit.slimefun4.utils.SlimefunUtils;
@@ -69,6 +69,7 @@ public class MagicWorkbench extends AbstractCraftingTable {
         }
     }
 
+    @ParametersAreNonnullByDefault
     private void craft(Inventory inv, Dispenser dispenser, Player p, Block b, ItemStack output) {
         Inventory fakeInv = createVirtualInventory(inv);
         Inventory outputInv = findOutputInventory(output, dispenser.getBlock(), inv, fakeInv);
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/PressureChamber.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/PressureChamber.java
index b4cb21081..c1420f60c 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/PressureChamber.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/multiblocks/PressureChamber.java
@@ -70,6 +70,7 @@ public class PressureChamber extends MultiBlockMachine {
             SlimefunPlugin.getLocalization().sendMessage(p, "machines.unknown-material", true);
         }
     }
+
     @ParametersAreNonnullByDefault
     private void craft(Player p, Block b, ItemStack output, Inventory outputInv, Dispenser dispenser) {
         for (int i = 0; i < 4; i++) {