diff --git a/src/main/java/land/chipmunk/chipmunkmod/modules/CommandCore.java b/src/main/java/land/chipmunk/chipmunkmod/modules/CommandCore.java
index cdf9c53..d8b1f97 100644
--- a/src/main/java/land/chipmunk/chipmunkmod/modules/CommandCore.java
+++ b/src/main/java/land/chipmunk/chipmunkmod/modules/CommandCore.java
@@ -4,6 +4,7 @@ import land.chipmunk.chipmunkmod.ChipmunkMod;
 import land.chipmunk.chipmunkmod.data.BlockArea;
 import land.chipmunk.chipmunkmod.listeners.Listener;
 import land.chipmunk.chipmunkmod.listeners.ListenerManager;
+import land.chipmunk.chipmunkmod.util.MathUtilities;
 import net.minecraft.block.entity.CommandBlockBlockEntity;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.network.ClientPlayNetworkHandler;
@@ -28,11 +29,11 @@ public class CommandCore {
 
   public boolean runFillCommand = true;
 
-  public static CommandCore INSTANCE = new CommandCore(MinecraftClient.getInstance(), ChipmunkMod.CONFIG.core.relativeArea);
+  public static CommandCore INSTANCE = new CommandCore(MinecraftClient.getInstance());
 
-  public CommandCore (MinecraftClient client, BlockArea relativeArea) {
+  public CommandCore (MinecraftClient client) {
     this.client = client;
-    this.relativeArea = relativeArea;
+    reloadRelativeArea();
   }
 
   public void init () {
@@ -56,20 +57,37 @@ public class CommandCore {
     final ClientPlayNetworkHandler networkHandler = client.getNetworkHandler();
 
     if (networkHandler == null) cleanup();
+
+    reloadRelativeArea();
   }
 
   public void reloadRelativeArea () {
-    relativeArea = ChipmunkMod.CONFIG.core.relativeArea;
+    // makes a copy
+    relativeArea = new BlockArea(
+            new BlockPos(ChipmunkMod.CONFIG.core.relativeArea.start),
+            new BlockPos(ChipmunkMod.CONFIG.core.relativeArea.end)
+    );
+
+    relativeArea.start = new BlockPos(
+            relativeArea.start.getX(),
+            (int) MathUtilities.clamp(relativeArea.start.getY(), client.world.getDimension().minY(), client.world.getDimension().height()),
+            relativeArea.start.getZ()
+    );
+    relativeArea.end = new BlockPos(
+            relativeArea.end.getX(),
+            (int) MathUtilities.clamp(relativeArea.end.getY(), client.world.getDimension().minY(), client.world.getDimension().height()),
+            relativeArea.end.getZ()
+    );
   }
 
   public void move (Vec3d position) {
     origin = new BlockPos(
             ((int) position.getX() / 16) * 16,
-            0, // TODO: Use the actual bottom of the world instead of hardcoding to 0
+            0,
             ((int) position.getZ() / 16) * 16
     );
 
-    if (currentBlockRelative == null) currentBlockRelative = new BlockPos(relativeArea.start);
+    currentBlockRelative = new BlockPos(relativeArea.start);
     refill();
 
     for (Listener listener : ListenerManager.listeners) listener.coreMoved();
diff --git a/src/main/java/land/chipmunk/chipmunkmod/util/MathUtilities.java b/src/main/java/land/chipmunk/chipmunkmod/util/MathUtilities.java
index 37cd5c2..981e98e 100644
--- a/src/main/java/land/chipmunk/chipmunkmod/util/MathUtilities.java
+++ b/src/main/java/land/chipmunk/chipmunkmod/util/MathUtilities.java
@@ -1,6 +1,10 @@
 package land.chipmunk.chipmunkmod.util;
 
 public class MathUtilities {
+    public static double clamp (double value, double min, double max) {
+        return Math.max(Math.min(value, max), min);
+    }
+
     public static float clamp (float value, float min, float max) {
         return Math.max(Math.min(value, max), min);
     }