diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/corp/CoreOverlay.java b/runelite-client/src/main/java/net/runelite/client/plugins/corp/CoreOverlay.java
deleted file mode 100644
index 7dc5ec8033..0000000000
--- a/runelite-client/src/main/java/net/runelite/client/plugins/corp/CoreOverlay.java
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Copyright (c) 2018, Adam <Adam@sigterm.info>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice, this
- *    list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-package net.runelite.client.plugins.corp;
-
-import java.awt.Color;
-import java.awt.Dimension;
-import java.awt.Graphics2D;
-import java.awt.Polygon;
-import javax.inject.Inject;
-import net.runelite.api.NPC;
-import net.runelite.client.ui.overlay.Overlay;
-import net.runelite.client.ui.overlay.OverlayLayer;
-import net.runelite.client.ui.overlay.OverlayPosition;
-import net.runelite.client.ui.overlay.OverlayUtil;
-
-class CoreOverlay extends Overlay
-{
-	private final CorpPlugin corpPlugin;
-	private final CorpConfig config;
-
-	@Inject
-	private CoreOverlay(CorpPlugin corpPlugin, CorpConfig corpConfig)
-	{
-		setPosition(OverlayPosition.DYNAMIC);
-		setLayer(OverlayLayer.ABOVE_SCENE);
-		this.corpPlugin = corpPlugin;
-		this.config = corpConfig;
-	}
-
-	@Override
-	public Dimension render(Graphics2D graphics)
-	{
-		NPC core = corpPlugin.getCore();
-		if (core != null && config.markDarkCore())
-		{
-			Polygon canvasTilePoly = core.getCanvasTilePoly();
-			if (canvasTilePoly != null)
-			{
-				OverlayUtil.renderPolygon(graphics, canvasTilePoly, Color.RED.brighter());
-			}
-		}
-
-		return null;
-	}
-}
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/corp/CorpConfig.java b/runelite-client/src/main/java/net/runelite/client/plugins/corp/CorpConfig.java
index e0103ead43..f6c699e0e4 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/corp/CorpConfig.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/corp/CorpConfig.java
@@ -28,9 +28,11 @@ import net.runelite.client.config.Config;
 import net.runelite.client.config.ConfigGroup;
 import net.runelite.client.config.ConfigItem;
 
-@ConfigGroup("corp")
+@ConfigGroup(CorpConfig.GROUP)
 public interface CorpConfig extends Config
 {
+	String GROUP = "corp";
+
 	@ConfigItem(
 		keyName = "showDamage",
 		name = "Show damage overlay",
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/corp/CorpPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/corp/CorpPlugin.java
index a6e9caf439..9cd17b047c 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/corp/CorpPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/corp/CorpPlugin.java
@@ -25,8 +25,10 @@
 package net.runelite.client.plugins.corp;
 
 import com.google.inject.Provides;
+import java.awt.Color;
 import java.util.HashSet;
 import java.util.Set;
+import java.util.function.Function;
 import javax.inject.Inject;
 import lombok.AccessLevel;
 import lombok.Getter;
@@ -50,6 +52,8 @@ import net.runelite.client.chat.ChatMessageManager;
 import net.runelite.client.chat.QueuedMessage;
 import net.runelite.client.config.ConfigManager;
 import net.runelite.client.eventbus.Subscribe;
+import net.runelite.client.game.npcoverlay.HighlightedNpc;
+import net.runelite.client.game.npcoverlay.NpcOverlayService;
 import net.runelite.client.plugins.Plugin;
 import net.runelite.client.plugins.PluginDescriptor;
 import net.runelite.client.ui.overlay.OverlayManager;
@@ -89,7 +93,24 @@ public class CorpPlugin extends Plugin
 	private CorpDamageOverlay corpOverlay;
 
 	@Inject
-	private CoreOverlay coreOverlay;
+	private CorpConfig config;
+
+	@Inject
+	private NpcOverlayService npcOverlayService;
+
+	private final Function<NPC, HighlightedNpc> isCore = (npc) ->
+	{
+		if (npc == core)
+		{
+			return HighlightedNpc.builder()
+				.npc(npc)
+				.tile(true)
+				.highlightColor(Color.RED.brighter())
+				.render(n -> config.markDarkCore())
+				.build();
+		}
+		return null;
+	};
 
 	@Provides
 	CorpConfig getConfig(ConfigManager configManager)
@@ -100,15 +121,15 @@ public class CorpPlugin extends Plugin
 	@Override
 	protected void startUp() throws Exception
 	{
+		npcOverlayService.registerHighlighter(isCore);
 		overlayManager.add(corpOverlay);
-		overlayManager.add(coreOverlay);
 	}
 
 	@Override
 	protected void shutDown() throws Exception
 	{
+		npcOverlayService.unregisterHighlighter(isCore);
 		overlayManager.remove(corpOverlay);
-		overlayManager.remove(coreOverlay);
 
 		corp = core = null;
 		yourDamage = 0;