diff --git a/src/main/java/id/co/gtc/cctvwithcuda/YoloDetector.java b/src/main/java/id/co/gtc/cctvwithcuda/YoloDetector.java
index 1f6b1b6..3375afb 100644
--- a/src/main/java/id/co/gtc/cctvwithcuda/YoloDetector.java
+++ b/src/main/java/id/co/gtc/cctvwithcuda/YoloDetector.java
@@ -13,7 +13,7 @@ import java.util.function.Consumer;
 @SuppressWarnings("FieldCanBeLocal")
 public class YoloDetector {
 
-    private List<String> classNames;
+    private final List<String> classNames;
     private Net net = null;
     private boolean loaded = false;