diff --git a/redisson/src/main/java/org/redisson/connection/ServiceManager.java b/redisson/src/main/java/org/redisson/connection/ServiceManager.java
index aedb0c861..21405e121 100644
--- a/redisson/src/main/java/org/redisson/connection/ServiceManager.java
+++ b/redisson/src/main/java/org/redisson/connection/ServiceManager.java
@@ -80,7 +80,7 @@ import java.util.function.Supplier;
  * @author Nikita Koksharov
  *
  */
-public class ServiceManager {
+public final class ServiceManager {
 
     private final Logger log = LoggerFactory.getLogger(getClass());