diff --git a/java_runtime/src/classes/java/io/file.rs b/java_runtime/src/classes/java/io/file.rs
index 91a26e51..905fd83e 100644
--- a/java_runtime/src/classes/java/io/file.rs
+++ b/java_runtime/src/classes/java/io/file.rs
@@ -14,7 +14,7 @@ impl File {
         RuntimeClassProto {
             name: "java/io/File",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<clinit>", "()V", Self::clinit, MethodAccessFlags::STATIC),
                 JavaMethodProto::new("<init>", "(Ljava/lang/String;)V", Self::init, Default::default()),
diff --git a/java_runtime/src/classes/java/lang/class.rs b/java_runtime/src/classes/java/lang/class.rs
index eec466a3..2891c88d 100644
--- a/java_runtime/src/classes/java/lang/class.rs
+++ b/java_runtime/src/classes/java/lang/class.rs
@@ -23,7 +23,7 @@ impl Class {
         RuntimeClassProto {
             name: "java/lang/Class",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "()V", Self::init, Default::default()),
                 JavaMethodProto::new("getName", "()Ljava/lang/String;", Self::get_name, Default::default()),
diff --git a/java_runtime/src/classes/java/lang/throwable.rs b/java_runtime/src/classes/java/lang/throwable.rs
index 12ef890c..48e9cf79 100644
--- a/java_runtime/src/classes/java/lang/throwable.rs
+++ b/java_runtime/src/classes/java/lang/throwable.rs
@@ -20,7 +20,7 @@ impl Throwable {
         RuntimeClassProto {
             name: "java/lang/Throwable",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "()V", Self::init, Default::default()),
                 JavaMethodProto::new("<init>", "(Ljava/lang/String;)V", Self::init_with_message, Default::default()),
diff --git a/java_runtime/src/classes/java/net/url.rs b/java_runtime/src/classes/java/net/url.rs
index 20f65e70..a21f1822 100644
--- a/java_runtime/src/classes/java/net/url.rs
+++ b/java_runtime/src/classes/java/net/url.rs
@@ -20,7 +20,7 @@ impl URL {
         RuntimeClassProto {
             name: "java/net/URL",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "(Ljava/lang/String;)V", Self::init_with_spec, Default::default()),
                 JavaMethodProto::new(
diff --git a/java_runtime/src/classes/java/util/array_list.rs b/java_runtime/src/classes/java/util/array_list.rs
index 21c9264a..695d8616 100644
--- a/java_runtime/src/classes/java/util/array_list.rs
+++ b/java_runtime/src/classes/java/util/array_list.rs
@@ -14,7 +14,7 @@ impl ArrayList {
         RuntimeClassProto {
             name: "java/util/ArrayList",
             parent_class: Some("java/util/AbstractList"),
-            interfaces: vec![],
+            interfaces: vec!["java/lang/Cloneable", "java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "()V", Self::init, Default::default()),
                 JavaMethodProto::new("<init>", "(I)V", Self::init_with_capacity, Default::default()),
diff --git a/java_runtime/src/classes/java/util/calendar.rs b/java_runtime/src/classes/java/util/calendar.rs
index fed9991f..0e9338f1 100644
--- a/java_runtime/src/classes/java/util/calendar.rs
+++ b/java_runtime/src/classes/java/util/calendar.rs
@@ -20,7 +20,7 @@ impl Calendar {
         RuntimeClassProto {
             name: "java/util/Calendar",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/io/Serializable", "java/lang/Cloneable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "()V", Self::init, Default::default()),
                 JavaMethodProto::new("getInstance", "()Ljava/util/Calendar;", Self::get_instance, MethodAccessFlags::STATIC),
diff --git a/java_runtime/src/classes/java/util/hash_map.rs b/java_runtime/src/classes/java/util/hash_map.rs
index e43d0271..177e9626 100644
--- a/java_runtime/src/classes/java/util/hash_map.rs
+++ b/java_runtime/src/classes/java/util/hash_map.rs
@@ -19,7 +19,7 @@ impl HashMap {
         RuntimeClassProto {
             name: "java/util/HashMap",
             parent_class: Some("java/util/AbstractMap"),
-            interfaces: vec![],
+            interfaces: vec!["java/lang/Cloneable", "java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "()V", Self::init, MethodAccessFlags::PUBLIC),
                 JavaMethodProto::new("<init>", "(I)V", Self::init_with_capacity, MethodAccessFlags::PUBLIC),
diff --git a/java_runtime/src/classes/java/util/hash_set.rs b/java_runtime/src/classes/java/util/hash_set.rs
index ffa5fc20..508afabd 100644
--- a/java_runtime/src/classes/java/util/hash_set.rs
+++ b/java_runtime/src/classes/java/util/hash_set.rs
@@ -18,7 +18,7 @@ impl HashSet {
         RuntimeClassProto {
             name: "java/util/HashSet",
             parent_class: Some("java/util/AbstractSet"),
-            interfaces: vec![],
+            interfaces: vec!["java/lang/Cloneable", "java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "()V", Self::init, Default::default()),
                 JavaMethodProto::new("<init>", "(I)V", Self::init_with_capacity, Default::default()),
diff --git a/java_runtime/src/classes/java/util/hashtable.rs b/java_runtime/src/classes/java/util/hashtable.rs
index d0ed3bca..07ebe21a 100644
--- a/java_runtime/src/classes/java/util/hashtable.rs
+++ b/java_runtime/src/classes/java/util/hashtable.rs
@@ -22,7 +22,7 @@ impl Hashtable {
         RuntimeClassProto {
             name: "java/util/Hashtable",
             parent_class: Some("java/util/Dictionary"),
-            interfaces: vec!["java/util/Map"],
+            interfaces: vec!["java/util/Map", "java/lang/Cloneable", "java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "()V", Self::init, Default::default()),
                 JavaMethodProto::new("<init>", "(I)V", Self::init_with_capacity, Default::default()),
diff --git a/java_runtime/src/classes/java/util/jar/attributes.rs b/java_runtime/src/classes/java/util/jar/attributes.rs
index aa506bd0..9f20ac97 100644
--- a/java_runtime/src/classes/java/util/jar/attributes.rs
+++ b/java_runtime/src/classes/java/util/jar/attributes.rs
@@ -13,7 +13,7 @@ impl Attributes {
         RuntimeClassProto {
             name: "java/util/jar/Attributes",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/lang/Cloneable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "()V", Self::init, Default::default()),
                 JavaMethodProto::new(
diff --git a/java_runtime/src/classes/java/util/jar/manifest.rs b/java_runtime/src/classes/java/util/jar/manifest.rs
index 7273f753..ce6a0908 100644
--- a/java_runtime/src/classes/java/util/jar/manifest.rs
+++ b/java_runtime/src/classes/java/util/jar/manifest.rs
@@ -16,7 +16,7 @@ impl Manifest {
         RuntimeClassProto {
             name: "java/util/jar/Manifest",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/lang/Cloneable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "(Ljava/io/InputStream;)V", Self::init, Default::default()),
                 JavaMethodProto::new("read", "(Ljava/io/InputStream;)V", Self::read, Default::default()),
diff --git a/java_runtime/src/classes/java/util/logging/level.rs b/java_runtime/src/classes/java/util/logging/level.rs
index 5b2b3352..7379652f 100644
--- a/java_runtime/src/classes/java/util/logging/level.rs
+++ b/java_runtime/src/classes/java/util/logging/level.rs
@@ -17,7 +17,7 @@ impl Level {
         RuntimeClassProto {
             name: "java/util/logging/Level",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<clinit>", "()V", Self::clinit, MethodAccessFlags::STATIC),
                 JavaMethodProto::new("<init>", "(Ljava/lang/String;I)V", Self::init, MethodAccessFlags::PROTECTED),
diff --git a/java_runtime/src/classes/java/util/logging/log_record.rs b/java_runtime/src/classes/java/util/logging/log_record.rs
index 24aeebe7..095cafac 100644
--- a/java_runtime/src/classes/java/util/logging/log_record.rs
+++ b/java_runtime/src/classes/java/util/logging/log_record.rs
@@ -19,7 +19,7 @@ impl LogRecord {
         RuntimeClassProto {
             name: "java/util/logging/LogRecord",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new(
                     "<init>",
diff --git a/java_runtime/src/classes/java/util/vector.rs b/java_runtime/src/classes/java/util/vector.rs
index 9cacb6ab..8cfd94e5 100644
--- a/java_runtime/src/classes/java/util/vector.rs
+++ b/java_runtime/src/classes/java/util/vector.rs
@@ -22,7 +22,7 @@ impl Vector {
         RuntimeClassProto {
             name: "java/util/Vector",
             parent_class: Some("java/util/AbstractList"),
-            interfaces: vec!["java/util/List"],
+            interfaces: vec!["java/util/List", "java/lang/Cloneable", "java/io/Serializable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "()V", Self::init, Default::default()),
                 JavaMethodProto::new("<init>", "(I)V", Self::init_with_capacity, Default::default()),
diff --git a/java_runtime/src/classes/java/util/zip/zip_entry.rs b/java_runtime/src/classes/java/util/zip/zip_entry.rs
index 6db0ef83..46a40ea9 100644
--- a/java_runtime/src/classes/java/util/zip/zip_entry.rs
+++ b/java_runtime/src/classes/java/util/zip/zip_entry.rs
@@ -13,7 +13,7 @@ impl ZipEntry {
         RuntimeClassProto {
             name: "java/util/zip/ZipEntry",
             parent_class: Some("java/lang/Object"),
-            interfaces: vec![],
+            interfaces: vec!["java/lang/Cloneable"],
             methods: vec![
                 JavaMethodProto::new("<init>", "(Ljava/lang/String;)V", Self::init, Default::default()),
                 JavaMethodProto::new("<init>", "(Ljava/util/zip/ZipEntry;)V", Self::init_with_zip_entry, Default::default()),
diff --git a/jvm/src/jvm.rs b/jvm/src/jvm.rs
index 105bb4ca..f74603a8 100644
--- a/jvm/src/jvm.rs
+++ b/jvm/src/jvm.rs
@@ -79,7 +79,14 @@ impl Jvm {
         };
 
         // load bootstrap classes
-        let bootstrap_classes = ["java/lang/Object", "java/lang/Runnable", "java/lang/Thread", "[B", "java/lang/Class"];
+        let bootstrap_classes = [
+            "java/lang/Object",
+            "java/lang/Runnable",
+            "java/lang/Thread",
+            "[B",
+            "java/io/Serializable",
+            "java/lang/Class",
+        ];
         for class_name in bootstrap_classes.iter() {
             let class_definition = jvm.inner.bootstrap_class_loader.load_class(&jvm, class_name).await?.unwrap();
             let class = Class::new(class_definition, None);