diff --git a/ares-common/src/main/java/com/github/ares/common/utils/Tuple2.java b/ares-common/src/main/java/com/github/ares/common/utils/Tuple2.java
index c9ed120..8c3633e 100644
--- a/ares-common/src/main/java/com/github/ares/common/utils/Tuple2.java
+++ b/ares-common/src/main/java/com/github/ares/common/utils/Tuple2.java
@@ -2,7 +2,7 @@
 
 import java.io.Serializable;
 
-public class Tuple2<T1 extends Serializable, T2 extends Serializable> implements Serializable {
+public class Tuple2<T1, T2> implements Serializable {
     private static final long serialVersionUID = 1L;
 
     private final T1 value1;
@@ -13,7 +13,7 @@ public Tuple2(T1 value1, T2 value2) {
         this.value2 = value2;
     }
 
-    public static <T1 extends Serializable, T2 extends Serializable> Tuple2<T1, T2> of(T1 value1, T2 value2) {
+    public static <T1, T2> Tuple2<T1, T2> of(T1 value1, T2 value2) {
         return new Tuple2<>(value1, value2);
     }