diff --git a/src/main/java/com/songoda/ultimatestacker/UltimateStacker.java b/src/main/java/com/songoda/ultimatestacker/UltimateStacker.java
index 6cfa4e7..a92b12e 100644
--- a/src/main/java/com/songoda/ultimatestacker/UltimateStacker.java
+++ b/src/main/java/com/songoda/ultimatestacker/UltimateStacker.java
@@ -281,7 +281,6 @@ public class UltimateStacker extends SongodaPlugin {
                 }
             }
         });
-        getServer().getPluginManager().registerEvents(new ChunkListener(this), this);
     }
 
     public void addExp(Player player, EntityStack stack) {
diff --git a/src/main/java/com/songoda/ultimatestacker/listeners/BlockListeners.java b/src/main/java/com/songoda/ultimatestacker/listeners/BlockListeners.java
index 5489978..e6d6c1b 100644
--- a/src/main/java/com/songoda/ultimatestacker/listeners/BlockListeners.java
+++ b/src/main/java/com/songoda/ultimatestacker/listeners/BlockListeners.java
@@ -45,6 +45,14 @@ public class BlockListeners implements Listener {
         this.plugin = plugin;
     }
 
+    @EventHandler
+    public void onChunkLoad(ChunkLoadEvent event) {
+        if (!Settings.STACK_BLOCKS.getBoolean()) return;
+        Chunk chunk = event.getChunk();
+        BlockStackManager blockStackManager = plugin.getBlockStackManager();
+        blockStackManager.getStacks().stream().filter(stack -> stack.getLocation().getChunk().equals(chunk)).forEach(plugin::updateHologram);
+    }
+
     @EventHandler(priority = EventPriority.HIGHEST)
     public void onBlockInteract(PlayerInteractEvent event) {
         if (event.useInteractedBlock() == Event.Result.DENY) return;
diff --git a/src/main/java/com/songoda/ultimatestacker/listeners/ChunkListener.java b/src/main/java/com/songoda/ultimatestacker/listeners/ChunkListener.java
deleted file mode 100644
index 8866462..0000000
--- a/src/main/java/com/songoda/ultimatestacker/listeners/ChunkListener.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package com.songoda.ultimatestacker.listeners;
-
-import com.songoda.ultimatestacker.UltimateStacker;
-import com.songoda.ultimatestacker.settings.Settings;
-import com.songoda.ultimatestacker.stackable.block.BlockStackManager;
-import org.bukkit.Chunk;
-import org.bukkit.event.EventHandler;
-import org.bukkit.event.Listener;
-import org.bukkit.event.world.ChunkLoadEvent;
-
-public class ChunkListener implements Listener {
-
-    private final BlockStackManager blockStackManager;
-    private final UltimateStacker plugin;
-
-    public ChunkListener(UltimateStacker plugin) {
-        this.blockStackManager = plugin.getBlockStackManager();
-        this.plugin = plugin;
-    }
-
-    @EventHandler
-    public void onChunkLoad(ChunkLoadEvent event) {
-        if (!Settings.STACK_BLOCKS.getBoolean()) return;
-        Chunk chunk = event.getChunk();
-        BlockStackManager blockStackManager = plugin.getBlockStackManager();
-        blockStackManager.getStacks().stream().filter(stack -> stack.getLocation().getChunk().equals(chunk)).forEach(plugin::updateHologram);
-    }
-}
diff --git a/src/main/java/com/songoda/ultimatestacker/stackable/block/BlockStackManager.java b/src/main/java/com/songoda/ultimatestacker/stackable/block/BlockStackManager.java
index 30474f4..136bb63 100644
--- a/src/main/java/com/songoda/ultimatestacker/stackable/block/BlockStackManager.java
+++ b/src/main/java/com/songoda/ultimatestacker/stackable/block/BlockStackManager.java
@@ -8,11 +8,10 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
 
 public class BlockStackManager {
 
-    private final Map<Location, BlockStack> registeredBlocks = new ConcurrentHashMap<>();
+    private final Map<Location, BlockStack> registeredBlocks = new HashMap<>();
 
     public void addBlocks(Map<Location, BlockStack> blocks) {
         this.registeredBlocks.putAll(blocks);