diff --git a/FightSystem_8/src/de/steamwar/fightsystem/utils/BlockIdWrapper8.java b/FightSystem_8/src/de/steamwar/fightsystem/utils/BlockIdWrapper8.java
index e338878..865c4a7 100644
--- a/FightSystem_8/src/de/steamwar/fightsystem/utils/BlockIdWrapper8.java
+++ b/FightSystem_8/src/de/steamwar/fightsystem/utils/BlockIdWrapper8.java
@@ -29,16 +29,19 @@ import java.util.Set;
 
 public class BlockIdWrapper8 implements BlockIdWrapper.IBlockIdWrapper {
     @Override
+    @SuppressWarnings("deprecation")
     public int blockToId(Block block) {
         return block.getTypeId() << 4 + block.getData();
     }
 
     @Override
+    @SuppressWarnings("deprecation")
     public void setBlock(World world, int x, int y, int z, int blockState) {
         world.getBlockAt(x, y, z).setTypeIdAndData(blockState >> 4, (byte)(blockState & 0b1111), false);
     }
 
     @Override
+    @SuppressWarnings("deprecation")
     public Set<Integer> getHiddenBlockIds() {
         Set<Integer> hiddenBlockIds = new HashSet<>();
         for(String tag : Config.HiddenBlocks){
@@ -48,6 +51,7 @@ public class BlockIdWrapper8 implements BlockIdWrapper.IBlockIdWrapper {
     }
 
     @Override
+    @SuppressWarnings("deprecation")
     public int getObfuscateWith() {
         return Material.matchMaterial(Config.ObfuscateWith).getId() << 4;
     }
diff --git a/FightSystem_Core/src/de/steamwar/fightsystem/commands/GUI.java b/FightSystem_Core/src/de/steamwar/fightsystem/commands/GUI.java
index a4bebff..688815c 100644
--- a/FightSystem_Core/src/de/steamwar/fightsystem/commands/GUI.java
+++ b/FightSystem_Core/src/de/steamwar/fightsystem/commands/GUI.java
@@ -139,7 +139,7 @@ public class GUI {
                 anvilInv.setItem(Material.LEATHER_CHESTPLATE);
                 anvilInv.setCallback(s -> {
                     SteamwarUser user = SteamwarUser.get(p.getUniqueId());
-                    if(PersonalKit.nameInUse(user.getId(), Config.SchematicType.toDB(), s)) {
+                    if(PersonalKit.get(user.getId(), Config.SchematicType.toDB(), s).isInUse()) {
                         msg.sendPrefixless("KITNAME_IN_USE", p, ChatMessageType.ACTION_BAR);
                         p.closeInventory();
                         return;
diff --git a/FightSystem_Core/src/de/steamwar/fightsystem/listener/InFightInventory.java b/FightSystem_Core/src/de/steamwar/fightsystem/listener/InFightInventory.java
index 894a497..e74c13a 100644
--- a/FightSystem_Core/src/de/steamwar/fightsystem/listener/InFightInventory.java
+++ b/FightSystem_Core/src/de/steamwar/fightsystem/listener/InFightInventory.java
@@ -29,8 +29,6 @@ import org.bukkit.event.block.BlockDispenseEvent;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.inventory.InventoryDragEvent;
 import org.bukkit.event.inventory.InventoryType;
-import org.bukkit.inventory.Inventory;
-import org.bukkit.inventory.ItemStack;
 
 public class InFightInventory implements Listener {
 
@@ -40,22 +38,12 @@ public class InFightInventory implements Listener {
 
     @EventHandler
     public void onInventoryClick(InventoryClickEvent event) {
-        Inventory clicked = event.getClickedInventory();
-        if(event.getClick().isShiftClick()){
-                ItemStack clickedOn = event.getCurrentItem();
+        InventoryType top = event.getView().getTopInventory().getType();
+        if(top == InventoryType.CRAFTING)
+            return;
 
-                if(
-                        clickedOn != null &&
-                        event.getView().getTopInventory().getType() != InventoryType.CRAFTING &&
-                        clicked == event.getWhoClicked().getInventory())
-                    event.setCancelled(true);
-        }else if (
-                clicked != event.getWhoClicked().getInventory() &&
-                clicked != null &&
-                clicked.getType() != InventoryType.PLAYER &&
-                event.getCursor() != null &&
-                event.getCursor().getType() != Material.AIR)
-            event.setCancelled(true);
+        if ((event.getCursor() != null && event.getCursor().getType() != Material.TNT) || (event.getCurrentItem() != null && event.getCurrentItem().getType() != Material.TNT))
+            event.setCancelled(true); // Deny if transferred item is not TNT
     }
 
     @EventHandler
diff --git a/FightSystem_Core/src/de/steamwar/fightsystem/utils/ItemBuilder.java b/FightSystem_Core/src/de/steamwar/fightsystem/utils/ItemBuilder.java
index 1a733d0..6161ae0 100644
--- a/FightSystem_Core/src/de/steamwar/fightsystem/utils/ItemBuilder.java
+++ b/FightSystem_Core/src/de/steamwar/fightsystem/utils/ItemBuilder.java
@@ -41,6 +41,8 @@ public class ItemBuilder {
 		item = new ItemStack(matrial, amount);
 		meta = item.getItemMeta();
 	}
+
+	@SuppressWarnings("deprecation")
 	public ItemBuilder(Material matrial, short subid) {
 		item = new ItemStack(matrial, 1, subid);
 		meta = item.getItemMeta();
diff --git a/pom.xml b/pom.xml
index 99c8b1b..35a72ae 100644
--- a/pom.xml
+++ b/pom.xml
@@ -24,6 +24,7 @@
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
+                    <compilerArgs>-Xlint</compilerArgs>
                 </configuration>
             </plugin>
             <plugin>