diff --git a/CHANGELOG.md b/CHANGELOG.md
index eba7cf7..f6115a3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 9.3.0
+- Added CraftBukkit compatibility (although I don't unterstand why anyone would prefer CraftBukkit over Spigot)
+
+## 9.2.0
+- Added support for PlayerVaultsX
+
 ## 9.1.1
 - Fixed category files being "too wildcardy" lol
 
diff --git a/pom.xml b/pom.xml
index 9e8cc47..d410a71 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,7 +9,7 @@
 	<name>ChestSort</name>
 	<url>https://www.chestsort.de</url>
 	<description>Automatically sorts your chests!</description>
-	<version>9.1.1</version>
+	<version>9.3.0</version>
 	<packaging>jar</packaging>
 
 	<properties>
@@ -51,6 +51,10 @@
 							<pattern>org.bstats</pattern>
 							<shadedPattern>de.jeff_media.ChestSort</shadedPattern>
 						</relocation>
+						<relocation>
+							<pattern>io.papermc.lib</pattern>
+							<shadedPattern>de.jeff_media.ChestSort.paperlib</shadedPattern> <!-- Replace this -->
+						</relocation>
 					</relocations>
 					<artifactSet>
 						<excludes>
@@ -85,6 +89,10 @@
 			<id>spigot-repo</id>
 			<url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
 		</repository>
+		<repository>
+			<id>papermc</id>
+			<url>https://papermc.io/repo/repository/maven-public/</url>
+		</repository>
 		<repository>
 			<id>placeholderapi</id>
 			<url>https://repo.extendedclip.com/content/repositories/placeholderapi/</url>
@@ -179,6 +187,12 @@
 			<version>RC-15</version>
 			<scope>provided</scope>
 		</dependency>
+		<dependency>
+			<groupId>io.papermc</groupId>
+			<artifactId>paperlib</artifactId>
+			<version>1.0.6</version>
+			<scope>compile</scope>
+		</dependency>
 	</dependencies>
 
 	<distributionManagement>
diff --git a/src/main/java/de/jeff_media/ChestSort/ChestSortDebugger.java b/src/main/java/de/jeff_media/ChestSort/ChestSortDebugger.java
index 3613a60..4da078f 100644
--- a/src/main/java/de/jeff_media/ChestSort/ChestSortDebugger.java
+++ b/src/main/java/de/jeff_media/ChestSort/ChestSortDebugger.java
@@ -1,38 +1,40 @@
 package de.jeff_media.ChestSort;
 
 import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.jetbrains.annotations.NotNull;
 
 public class ChestSortDebugger implements @NotNull Listener {
-	
-	private final ChestSortPlugin plugin;
 
-	ChestSortDebugger(ChestSortPlugin plugin) {
-		plugin.getLogger().warning("=======================================");
-		plugin.getLogger().warning("    CHESTSORT DEBUG MODE ACTIVATED!");
-		plugin.getLogger().warning("Only use this for development purposes!");
-		plugin.getLogger().warning("=======================================");
-		this.plugin=plugin;
-	}
-	
-	@EventHandler
-	public void onInventoryClickEvent(InventoryClickEvent e) {
-		// Debug
-		if(plugin.debug) {
-			System.out.println(" ");
-			System.out.println("InventoryClickEvent:");
-			System.out.println("- Holder: " + e.getInventory().getHolder());
-			if(e.getInventory().getHolder()!=null) {
-				System.out.println("- Holder class: "+e.getInventory().getHolder().getClass());
+    private final ChestSortPlugin plugin;
+
+    ChestSortDebugger(ChestSortPlugin plugin) {
+        plugin.getLogger().warning("=======================================");
+        plugin.getLogger().warning("    CHESTSORT DEBUG MODE ACTIVATED!");
+        plugin.getLogger().warning("Only use this for development purposes!");
+        plugin.getLogger().warning("=======================================");
+        this.plugin = plugin;
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST)
+    public void onInventoryClickEvent(InventoryClickEvent e) {
+    	if(plugin.debug) {
+			// Debug
+			plugin.debug(" ");
+			plugin.debug("InventoryClickEvent:");
+			plugin.debug("- Holder: " + e.getInventory().getHolder());
+			if (e.getInventory().getHolder() != null) {
+				plugin.debug("- Holder class: " + e.getInventory().getHolder().getClass());
 			}
-			System.out.println("- Slot: "+e.getRawSlot());
-			System.out.println("- Left-Click: "+e.isLeftClick());
-			System.out.println("- Right-Click: "+e.isRightClick());
-			System.out.println("- Shift-Click: "+e.isShiftClick());
-			System.out.println(" ");
+			plugin.debug("- Slot: " + e.getRawSlot());
+			plugin.debug("- Left-Click: " + e.isLeftClick());
+			plugin.debug("- Right-Click: " + e.isRightClick());
+			plugin.debug("- Shift-Click: " + e.isShiftClick());
+			plugin.debug(" ");
 		}
-	}
+
+    }
 
 }
diff --git a/src/main/java/de/jeff_media/ChestSort/ChestSortListener.java b/src/main/java/de/jeff_media/ChestSort/ChestSortListener.java
index 2ddc688..c83c161 100644
--- a/src/main/java/de/jeff_media/ChestSort/ChestSortListener.java
+++ b/src/main/java/de/jeff_media/ChestSort/ChestSortListener.java
@@ -1,9 +1,6 @@
 package de.jeff_media.ChestSort;
 
-import de.jeff_media.ChestSort.hooks.CrateReloadedHook;
-import de.jeff_media.ChestSort.hooks.GoldenCratesHook;
-import de.jeff_media.ChestSort.hooks.HeadDatabaseHook;
-import de.jeff_media.ChestSort.hooks.MinepacksHook;
+import de.jeff_media.ChestSort.hooks.*;
 import de.jeff_media.ChestSort.utils.LlamaUtils;
 import de.jeff_media.ChestSortAPI.ChestSortEvent;
 import de.jeff_media.ChestSortAPI.ISortable;
@@ -354,36 +351,48 @@ public class ChestSortListener implements Listener {
     @EventHandler(ignoreCancelled = true, priority = EventPriority.HIGHEST)
     public void onHotkey(InventoryClickEvent event) {
 
+        plugin.debug2("Hotkey?");
+
         if (!(event.getWhoClicked() instanceof Player)) {
+            plugin.debug2("exit: 0");
             return;
         }
 
+
         Player p = (Player) event.getWhoClicked();
 
         plugin.registerPlayerIfNeeded(p);
 
         if (!plugin.getConfig().getBoolean("allow-sorting-hotkeys")) {
+            plugin.debug2("exit: 1");
             return;
         }
 
+
         if (!p.hasPermission("chestsort.use") && !p.hasPermission("chestsort.use.inventory")) {
+            plugin.debug2("exit: 2");
             return;
         }
 
+
         //InventoryHolder holder = event.getInventory().getHolder();
         if (event.getClickedInventory() == null) {
+            plugin.debug2("exit: 3");
             return;
         }
 
+
         boolean isAPICall = isAPICall(event.getClickedInventory());
 
         // Detect generic GUIs
         if(!isAPICall &&
                 (plugin.genericHook.isPluginGUI(event.getInventory())
                 || plugin.genericHook.isPluginGUI(event.getInventory()))) {
+            plugin.debug("Aborting hotkey sorting: no API call & generic GUI detected");
             return;
         }
 
+
         // Possible fix for #57
         if (!isAPICall && (event.getClickedInventory().getHolder() != null
                 && event.getClickedInventory().getHolder() == p
@@ -392,6 +401,7 @@ public class ChestSortListener implements Listener {
             return;
         }
 
+
         // End Possible fix for #57
         InventoryHolder holder = event.getClickedInventory().getHolder();
 
@@ -405,12 +415,14 @@ public class ChestSortListener implements Listener {
             return;
         }
 
+
         // Prevent player from putting items into GUI inventory
         if (event.getInventory() == setting.guiInventory) {
             event.setCancelled(true);
             return;
         }
 
+
         switch (event.getClick()) {
             case MIDDLE:
                 cause = ChestSortLogger.SortCause.H_MIDDLE;
@@ -426,6 +438,7 @@ public class ChestSortListener implements Listener {
                 }
                 break;
             case DOUBLE_CLICK:
+                if(event.isShiftClick()) return;
                 cause = ChestSortLogger.SortCause.H_DOUBLE;
                 //if(plugin.getConfig().getBoolean("hotkeys.double-click")) {
                 if (setting.doubleClick) {
@@ -461,23 +474,40 @@ public class ChestSortListener implements Listener {
             return;
         }
 
-        if (isAPICall || belongsToChestLikeBlock(event.getClickedInventory()) || LlamaUtils.belongsToLlama(event.getClickedInventory()) || minepacksHook.isMinepacksBackpack(event.getClickedInventory())) {
+
+        if(plugin.isInHotkeyCooldown(p.getUniqueId())) {
+            plugin.debug("Skipping: hotkey cooldown");
+            return;
+        }
+
+
+        plugin.debug("Hotkey triggered: " + event.getClick().name());
+
+        if (isAPICall
+                || belongsToChestLikeBlock(event.getClickedInventory())
+                || LlamaUtils.belongsToLlama(event.getClickedInventory())
+                || minepacksHook.isMinepacksBackpack(event.getClickedInventory())
+                || plugin.playerVaultsHook.isPlayerVault(event.getClickedInventory())) {
+
 
             if (!p.hasPermission("chestsort.use")) {
                 return;
             }
 
             if (LlamaUtils.belongsToLlama(event.getClickedInventory())) {
+
                 plugin.lgr.logSort(p,cause);
                 ChestedHorse llama = (ChestedHorse) event.getInventory().getHolder();
                 plugin.organizer.sortInventory(event.getClickedInventory(), 2, LlamaUtils.getLlamaChestSize(llama) + 1);
                 plugin.organizer.updateInventoryView(event);
                 return;
             }
+
             plugin.lgr.logSort(p,cause);
             plugin.organizer.sortInventory(event.getClickedInventory());
             plugin.organizer.updateInventoryView(event);
         } else if (holder instanceof Player) {
+
             if (!p.hasPermission("chestsort.use.inventory")) {
                 return;
             }
@@ -486,10 +516,12 @@ public class ChestSortListener implements Listener {
                 plugin.lgr.logSort(p,cause);
                 plugin.organizer.sortInventory(p.getInventory(), 0, 8);
                 plugin.organizer.updateInventoryView(event);
+
             } else if (event.getSlotType() == SlotType.CONTAINER) {
                 plugin.lgr.logSort(p,cause);
                 plugin.organizer.sortInventory(p.getInventory(), 9, 35);
                 plugin.organizer.updateInventoryView(event);
+
             }
         }
     }
diff --git a/src/main/java/de/jeff_media/ChestSort/ChestSortOrganizer.java b/src/main/java/de/jeff_media/ChestSort/ChestSortOrganizer.java
index 46ee092..10a291f 100644
--- a/src/main/java/de/jeff_media/ChestSort/ChestSortOrganizer.java
+++ b/src/main/java/de/jeff_media/ChestSort/ChestSortOrganizer.java
@@ -460,8 +460,10 @@ public class ChestSortOrganizer {
     // Sort an inventory only between startSlot and endSlot
     void sortInventory(@NotNull Inventory inv, int startSlot, int endSlot) {
         if(inv==null) return;
+        plugin.debug("Attempting to sort an Inventory and calling ChestSortEvent.");
         Class<? extends Inventory> invClass = inv.getClass();
         de.jeff_media.ChestSortAPI.ChestSortEvent chestSortEvent = new de.jeff_media.ChestSortAPI.ChestSortEvent(inv);
+
         try {
             if (invClass.getMethod("getLocation", null) != null) {
                 // This whole try/catch fixes MethodNotFoundException when using inv.getLocation in Spigot 1.8.
@@ -490,6 +492,7 @@ public class ChestSortOrganizer {
 
         Bukkit.getPluginManager().callEvent(chestSortEvent);
         if (chestSortEvent.isCancelled()) {
+            plugin.debug("ChestSortEvent cancelled, I'll stay in bed.");
             return;
         }
 
@@ -597,6 +600,7 @@ public class ChestSortOrganizer {
             inv.setItem(currentSlot, item);
             currentSlot++;
         }
+        plugin.debug("Sorting successful. I'll go back to bed now.");
     }
 
     public void updateInventoryView(InventoryClickEvent event) {
diff --git a/src/main/java/de/jeff_media/ChestSort/ChestSortPlugin.java b/src/main/java/de/jeff_media/ChestSort/ChestSortPlugin.java
index a312487..d2441be 100644
--- a/src/main/java/de/jeff_media/ChestSort/ChestSortPlugin.java
+++ b/src/main/java/de/jeff_media/ChestSort/ChestSortPlugin.java
@@ -41,9 +41,12 @@ import java.util.Iterator;
 import java.util.Map;
 import java.util.UUID;
 
+import de.jeff_media.ChestSort.config.Config;
 import de.jeff_media.ChestSort.hooks.GenericGUIHook;
+import de.jeff_media.ChestSort.hooks.PlayerVaultsHook;
 import de.jeff_media.ChestSort.placeholders.ChestSortPlaceholders;
 import de.jeff_media.PluginUpdateChecker.PluginUpdateChecker;
+import io.papermc.lib.PaperLib;
 import org.bstats.bukkit.Metrics;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
@@ -61,6 +64,7 @@ public class ChestSortPlugin extends JavaPlugin implements de.jeff_media.ChestSo
 
 	ChestSortLogger lgr;
 	Map<String, ChestSortPlayerSetting> perPlayerSettings = new HashMap<>();
+	HashMap<UUID,Long> hotkeyCooldown;
 	ChestSortMessages messages;
 	ChestSortOrganizer organizer;
 	PluginUpdateChecker updateChecker;
@@ -70,7 +74,7 @@ public class ChestSortPlugin extends JavaPlugin implements de.jeff_media.ChestSo
 	String sortingMethod;
 	ArrayList<String> disabledWorlds;
 	ChestSortAPIHandler api;
-	final int currentConfigVersion = 44;
+	final int currentConfigVersion = 45;
 	boolean usingMatchingConfig = true;
 	protected boolean debug = false;
 	boolean verbose = true;
@@ -81,6 +85,7 @@ public class ChestSortPlugin extends JavaPlugin implements de.jeff_media.ChestSo
 	public boolean hookMinepacks = false;
 
 	public GenericGUIHook genericHook;
+	public PlayerVaultsHook playerVaultsHook;
 	
 	private static long updateCheckInterval = 4*60*60; // in seconds. We check on startup and every 4 hours
 	
@@ -133,6 +138,10 @@ public class ChestSortPlugin extends JavaPlugin implements de.jeff_media.ChestSo
 		if(debug) getLogger().warning("[DEBUG] "+t);
 	}
 
+	public void debug2(String t) {
+		if(getConfig().getBoolean(Config.DEBUG2)) getLogger().warning("[DEBUG2] "+t);
+	}
+
 	// Creates the default configuration file
 	// Also checks the config-version of an already existing file. If the existing
 	// config is too
@@ -490,12 +499,26 @@ public class ChestSortPlugin extends JavaPlugin implements de.jeff_media.ChestSo
 		messages = new ChestSortMessages(this);
 		organizer = new ChestSortOrganizer(this);
 		settingsGUI = new ChestSortSettingsGUI(this);
-		updateChecker = new PluginUpdateChecker(this, "https://api.jeff-media.de/chestsort/chestsort-latest-version.txt", "https://chestsort.de", "https://chestsort.de/changelog", "https://chestsort.de/donate");
+		try {
+			if(Class.forName("net.md_5.bungee.api.chat.BaseComponent") != null) {
+				updateChecker = new PluginUpdateChecker(this, "https://api.jeff-media.de/chestsort/chestsort-latest-version.txt", "https://chestsort.de", "https://chestsort.de/changelog", "https://chestsort.de/donate");
+			} else {
+				getLogger().severe("You are using an unsupported server software! Consider switching to Spigot or Paper!");
+				getLogger().severe("The Update Checker will NOT work when using CraftBukkit instead of Spigot/Paper!");
+				PaperLib.suggestPaper(this);
+			}
+		} catch (ClassNotFoundException e) {
+			getLogger().severe("You are using an unsupported server software! Consider switching to Spigot or Paper!");
+			getLogger().severe("The Update Checker will NOT work when using CraftBukkit instead of Spigot/Paper!");
+			PaperLib.suggestPaper(this);
+		}
 		listener = new ChestSortListener(this);
 		api = new ChestSortAPIHandler(this);
+		hotkeyCooldown = new HashMap<>();
 		permissionsHandler = new ChestSortPermissionsHandler(this);
 		updateCheckInterval = (int) (getConfig().getDouble("check-interval")*60*60);
 		sortingMethod = getConfig().getString("sorting-method");
+		playerVaultsHook = new PlayerVaultsHook(this);
 		getServer().getPluginManager().registerEvents(listener, this);
 		getServer().getPluginManager().registerEvents(settingsGUI, this);
 		ChestSortChestSortCommand chestsortCommandExecutor = new ChestSortChestSortCommand(this);
@@ -536,11 +559,13 @@ public class ChestSortPlugin extends JavaPlugin implements de.jeff_media.ChestSo
 			getLogger().info("Categories: " + getCategoryList());
 		}
 
-		if (getConfig().getString("check-for-updates", "true").equalsIgnoreCase("true")) {
-			updateChecker.check(updateCheckInterval);
-		} // When set to on-startup, we check right now (delay 0)
-		else if (getConfig().getString("check-for-updates", "true").equalsIgnoreCase("on-startup")) {
-			updateChecker.check();
+		if(updateChecker!=null) {
+			if (getConfig().getString("check-for-updates", "true").equalsIgnoreCase("true")) {
+				updateChecker.check(updateCheckInterval);
+			} // When set to on-startup, we check right now (delay 0)
+			else if (getConfig().getString("check-for-updates", "true").equalsIgnoreCase("on-startup")) {
+				updateChecker.check();
+			}
 		}
 
 		registerMetrics();
@@ -590,6 +615,17 @@ public class ChestSortPlugin extends JavaPlugin implements de.jeff_media.ChestSo
 
 	}
 
+	public boolean isInHotkeyCooldown(UUID uuid) {
+		double cooldown = getConfig().getDouble(Config.HOTKEY_COOLDOWN)*1000;
+		if(cooldown==0) return false;
+		long lastUsage = hotkeyCooldown.containsKey(uuid) ? hotkeyCooldown.get(uuid) : 0;
+		long currentTime = System.currentTimeMillis();
+		long difference = currentTime-lastUsage;
+		hotkeyCooldown.put(uuid,currentTime);
+		debug("Difference: "+difference);
+		return difference <= cooldown;
+	}
+
 	void registerPlayerIfNeeded(Player p) {
 		// Players are stored by their UUID, so that name changes don't break player's
 		// settings
diff --git a/src/main/java/de/jeff_media/ChestSort/config/Config.java b/src/main/java/de/jeff_media/ChestSort/config/Config.java
new file mode 100644
index 0000000..85d9d2d
--- /dev/null
+++ b/src/main/java/de/jeff_media/ChestSort/config/Config.java
@@ -0,0 +1,17 @@
+package de.jeff_media.ChestSort.config;
+
+import de.jeff_media.ChestSort.ChestSortPlugin;
+
+public class Config {
+    public static final String HOTKEY_COOLDOWN = "hotkey-cooldown";
+    public static final String DEBUG2 = "debug2";
+
+    private final ChestSortPlugin main;
+
+    public Config(ChestSortPlugin main) {
+        this.main=main;
+
+        main.getConfig().addDefault(HOTKEY_COOLDOWN,0.0);
+        main.getConfig().addDefault(DEBUG2,false);
+    }
+}
diff --git a/src/main/java/de/jeff_media/ChestSort/hooks/PlayerVaultsHook.java b/src/main/java/de/jeff_media/ChestSort/hooks/PlayerVaultsHook.java
new file mode 100644
index 0000000..f8784c9
--- /dev/null
+++ b/src/main/java/de/jeff_media/ChestSort/hooks/PlayerVaultsHook.java
@@ -0,0 +1,20 @@
+package de.jeff_media.ChestSort.hooks;
+
+import de.jeff_media.ChestSort.ChestSortPlugin;
+import org.bukkit.inventory.Inventory;
+
+public class PlayerVaultsHook {
+
+    private final ChestSortPlugin main;
+
+    public PlayerVaultsHook(ChestSortPlugin main) {
+        this.main=main;
+    }
+
+    public boolean isPlayerVault(Inventory inv) {
+        if(inv==null) return false;
+        if(inv.getHolder()==null) return false;
+        if(!main.getConfig().getBoolean("hook-playervaultsx",true)) return false;
+        return inv.getHolder().getClass().getName().equals("com.drtshock.playervaults.vaultmanagement.VaultHolder");
+    }
+}
diff --git a/src/main/resources/config.yml b/src/main/resources/config.yml
index 5ba598e..9947137 100644
--- a/src/main/resources/config.yml
+++ b/src/main/resources/config.yml
@@ -145,6 +145,10 @@ sorting-hotkeys:
   # Use shift + right-click on any EMPTY inventory slot as hotkey
   shift-right-click: true
 
+# Amount in seconds that players have to wait between using hotkeys to prevent them from spamming the
+# sorting mechanism
+hotkey-cooldown: 0.2
+
 # Additionally to sorting hotkeys, you can quickly unload your inventory into a chest and vice versa
 # using left-click or right-click outside of a chest's inventory.
 # A single click will only affect matching items (items that are already present in the other inventory)
@@ -225,6 +229,11 @@ hook-inventorypages: true
 # backpacks and sort them like a regular chest.
 hook-minepacks: true
 
+##### PlayerVaultsX #####
+# When PlayerVaultsX is installed, ChestSort can sort your
+# player vaults just like regular chests.
+hook-playervaultsx: true
+
 ##### CrateReloaded #####
 # Prevents the player from using hotkeys on a crate
 hook-cratereloaded: true
@@ -642,10 +651,11 @@ dump: false
 
 # Debug mode - you probably do not want this.
 debug: false
+debug2: false
 
 # Enable log - you probably do not want this.
 log: false
 
 # Please DO NOT change the following line manually!
 # It is used by the automatic config updater.
-config-version: 44
+config-version: 45
\ No newline at end of file
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index 049f191..0c94f64 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -1,6 +1,6 @@
 main: de.jeff_media.ChestSort.ChestSortPlugin
 name: ChestSort
-version: 9.1.1
+version: 9.3.0
 api-version: "1.13"
 description: Allows automatic chest sorting
 author: mfnalex