diff --git a/protocol/src/main/java/com/zfoo/protocol/buffer/ByteBufUtils.java b/protocol/src/main/java/com/zfoo/protocol/buffer/ByteBufUtils.java
index 44b23fe9..8548e64b 100644
--- a/protocol/src/main/java/com/zfoo/protocol/buffer/ByteBufUtils.java
+++ b/protocol/src/main/java/com/zfoo/protocol/buffer/ByteBufUtils.java
@@ -844,9 +844,9 @@ public abstract class ByteBufUtils {
 
     public static Set<Byte> readByteSet(ByteBuf byteBuf) {
         var length = readInt(byteBuf);
-        var set = (Set<Byte>) CollectionUtils.newFixedSet(length);
+        var set = new HashByteSet(length);
         for (var i = 0; i < length; i++) {
-            set.add(readByteBox(byteBuf));
+            set.add(readByte(byteBuf));
         }
         return set;
     }
@@ -930,9 +930,9 @@ public abstract class ByteBufUtils {
 
     public static Set<Short> readShortSet(ByteBuf byteBuf) {
         var length = readInt(byteBuf);
-        var set = (Set<Short>) CollectionUtils.newFixedSet(length);
+        var set = new HashShortSet(length);
         for (var i = 0; i < length; i++) {
-            set.add(readShortBox(byteBuf));
+            set.add(readShort(byteBuf));
         }
         return set;
     }
@@ -1009,9 +1009,9 @@ public abstract class ByteBufUtils {
 
     public static Set<Integer> readIntSet(ByteBuf byteBuf) {
         var length = readInt(byteBuf);
-        var set = (Set<Integer>) CollectionUtils.newFixedSet(length);
+        var set = new HashIntSet(length);
         for (var i = 0; i < length; i++) {
-            set.add(readIntBox(byteBuf));
+            set.add(readInt(byteBuf));
         }
         return set;
     }
@@ -1088,9 +1088,9 @@ public abstract class ByteBufUtils {
 
     public static Set<Long> readLongSet(ByteBuf byteBuf) {
         var length = readInt(byteBuf);
-        var set = (Set<Long>) CollectionUtils.newFixedSet(length);
+        var set = new HashLongSet(length);
         for (var i = 0; i < length; i++) {
-            set.add(readLongBox(byteBuf));
+            set.add(readLong(byteBuf));
         }
         return set;
     }
diff --git a/protocol/src/test/java/com/zfoo/protocol/collection/FixedCollectionTest.java b/protocol/src/test/java/com/zfoo/protocol/collection/FixedCollectionTest.java
index 8e4d21c1..be10445f 100644
--- a/protocol/src/test/java/com/zfoo/protocol/collection/FixedCollectionTest.java
+++ b/protocol/src/test/java/com/zfoo/protocol/collection/FixedCollectionTest.java
@@ -49,19 +49,18 @@ public class FixedCollectionTest {
 
 
     @Test
-    public void testFixedHashInt() {
-        var list = new FixedSizeListInt(3);
-        list.set(0, 1);
-        list.set(1, 2);
-        list.set(2, 4);
-        var set = new FixedHashSetInt(list);
+    public void testHashIntSet() {
+        var set = new HashIntSet(3);
+        set.add(1);
+        set.add(2);
+        set.add(3);
         for (int i = 0; i < set.size(); i++) {
             for (var ele : set) {
                 // test iterator
             }
         }
 
-        Assert.assertTrue(set.contains(4));
+        Assert.assertTrue(set.contains(3));
     }
 
 }