diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/pestcontrol/Game.java b/runelite-client/src/main/java/net/runelite/client/plugins/pestcontrol/Game.java
index a40471a341..9f330f6088 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/pestcontrol/Game.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/pestcontrol/Game.java
@@ -41,9 +41,9 @@ import net.runelite.api.events.GameTick;
 @Slf4j
 public class Game
 {
-	private Client client;
+	private final Client client;
 
-	private PestControlPlugin plugin;
+	private final PestControlPlugin plugin;
 
 	@Getter(AccessLevel.PACKAGE)
 	private Portal bluePortal = new Portal(PortalColor.BLUE, WidgetPortal.BLUE);
@@ -66,7 +66,7 @@ public class Game
 	private boolean portalLocationsSet = false;
 
 
-	private Instant startTime = Instant.now();
+	private final Instant startTime = Instant.now();
 
 	public Game(Client client, PestControlPlugin plugin)
 	{
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/pestcontrol/PortalWeaknessOverlay.java b/runelite-client/src/main/java/net/runelite/client/plugins/pestcontrol/PortalWeaknessOverlay.java
index 7f8d94148b..941f851b6c 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/pestcontrol/PortalWeaknessOverlay.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/pestcontrol/PortalWeaknessOverlay.java
@@ -53,11 +53,11 @@ public class PortalWeaknessOverlay extends Overlay
 	private final PestControlPlugin plugin;
 	private final Client client;
 
-	private BufferedImage magicImage;
-	private BufferedImage rangedImage;
-	private BufferedImage stabImage;
-	private BufferedImage slashImage;
-	private BufferedImage crushImage;
+	private final BufferedImage magicImage;
+	private final BufferedImage rangedImage;
+	private final BufferedImage stabImage;
+	private final BufferedImage slashImage;
+	private final BufferedImage crushImage;
 
 	@Inject
 	PortalWeaknessOverlay(