1 files changed, 2 insertions, 2 deletions
diff --git a/src/main/java/org/traccar/EventLoopGroupFactory.java b/src/main/java/org/traccar/EventLoopGroupFactory.java
index 482559253..5c6fb7459 100644
--- a/src/main/java/org/traccar/EventLoopGroupFactory.java
+++ b/src/main/java/org/traccar/EventLoopGroupFactory.java
@@ -20,8 +20,8 @@ import io.netty.channel.nio.NioEventLoopGroup;
 
 public final class EventLoopGroupFactory {
 
-    private static EventLoopGroup bossGroup = new NioEventLoopGroup();
-    private static EventLoopGroup workerGroup = new NioEventLoopGroup();
+    private static final EventLoopGroup bossGroup = new NioEventLoopGroup();
+    private static final EventLoopGroup workerGroup = new NioEventLoopGroup();
 
     private EventLoopGroupFactory() {
     }