diff --git a/deps/v8/include/v8-version.h b/deps/v8/include/v8-version.h
index 953b2d19ac43a8..25ce5d071e71c3 100644
--- a/deps/v8/include/v8-version.h
+++ b/deps/v8/include/v8-version.h
@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 6
 #define V8_MINOR_VERSION 2
 #define V8_BUILD_NUMBER 414
-#define V8_PATCH_LEVEL 49
+#define V8_PATCH_LEVEL 50
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)
diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index a4134ad54229c7..c70154fd710e0c 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -2452,7 +2452,7 @@ enum class NewStringType {
  */
 class V8_EXPORT String : public Name {
  public:
-  static constexpr int kMaxLength =
+  static const int kMaxLength =
       sizeof(void*) == 4 ? (1 << 28) - 16 : (1 << 30) - 1 - 24;
 
   enum Encoding {
@@ -4122,10 +4122,10 @@ class V8_EXPORT WasmCompiledModule : public Object {
   // supports move semantics, and does not support copy semantics.
   class TransferrableModule final {
    public:
-    TransferrableModule(TransferrableModule&& src) = default;
+    TransferrableModule(TransferrableModule&& src);
     TransferrableModule(const TransferrableModule& src) = delete;
 
-    TransferrableModule& operator=(TransferrableModule&& src) = default;
+    TransferrableModule& operator=(TransferrableModule&& src);
     TransferrableModule& operator=(const TransferrableModule& src) = delete;
 
    private:
@@ -4200,24 +4200,19 @@ class V8_EXPORT WasmModuleObjectBuilderStreaming final {
 
   WasmModuleObjectBuilderStreaming(const WasmModuleObjectBuilderStreaming&) =
       delete;
-  WasmModuleObjectBuilderStreaming(WasmModuleObjectBuilderStreaming&&) =
-      default;
+  WasmModuleObjectBuilderStreaming(WasmModuleObjectBuilderStreaming&&);
   WasmModuleObjectBuilderStreaming& operator=(
       const WasmModuleObjectBuilderStreaming&) = delete;
   WasmModuleObjectBuilderStreaming& operator=(
-      WasmModuleObjectBuilderStreaming&&) = default;
+      WasmModuleObjectBuilderStreaming&&);
   Isolate* isolate_ = nullptr;
 
-#if V8_CC_MSVC
   // We don't need the static Copy API, so the default
   // NonCopyablePersistentTraits would be sufficient, however,
   // MSVC eagerly instantiates the Copy.
   // We ensure we don't use Copy, however, by compiling with the
   // defaults everywhere else.
   Persistent<Promise, CopyablePersistentTraits<Promise>> promise_;
-#else
-  Persistent<Promise> promise_;
-#endif
   std::vector<Buffer> received_buffers_;
   size_t total_size_ = 0;
 };
@@ -4238,9 +4233,9 @@ class V8_EXPORT WasmModuleObjectBuilder final {
   // Disable copy semantics *in this implementation*. We can choose to
   // relax this, albeit it's not clear why.
   WasmModuleObjectBuilder(const WasmModuleObjectBuilder&) = delete;
-  WasmModuleObjectBuilder(WasmModuleObjectBuilder&&) = default;
+  WasmModuleObjectBuilder(WasmModuleObjectBuilder&&);
   WasmModuleObjectBuilder& operator=(const WasmModuleObjectBuilder&) = delete;
-  WasmModuleObjectBuilder& operator=(WasmModuleObjectBuilder&&) = default;
+  WasmModuleObjectBuilder& operator=(WasmModuleObjectBuilder&&);
 
   std::vector<Buffer> received_buffers_;
   size_t total_size_ = 0;
@@ -4502,7 +4497,7 @@ class V8_EXPORT TypedArray : public ArrayBufferView {
   /*
    * The largest typed array size that can be constructed using New.
    */
-  static constexpr size_t kMaxLength =
+  static const size_t kMaxLength =
       sizeof(void*) == 4 ? (1u << 30) - 1 : (1u << 31) - 1;
 
   /**
diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index 561a571516a22f..078796f5dbb4f2 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -7714,6 +7714,18 @@ MaybeLocal<Proxy> Proxy::New(Local<Context> context, Local<Object> local_target,
   RETURN_ESCAPED(result);
 }
 
+WasmCompiledModule::TransferrableModule::TransferrableModule(
+    TransferrableModule&& src)
+    : compiled_code(std::move(src.compiled_code))
+    , wire_bytes(std::move(src.wire_bytes)) {}
+
+WasmCompiledModule::TransferrableModule&
+WasmCompiledModule::TransferrableModule::operator=(TransferrableModule&& src) {
+  compiled_code = std::move(src.compiled_code);
+  wire_bytes = std::move(src.wire_bytes);
+  return *this;
+}
+
 Local<String> WasmCompiledModule::GetWasmWireBytes() {
   i::Handle<i::WasmModuleObject> obj =
       i::Handle<i::WasmModuleObject>::cast(Utils::OpenHandle(this));
@@ -7826,6 +7838,22 @@ WasmModuleObjectBuilderStreaming::WasmModuleObjectBuilderStreaming(
   }
 }
 
+WasmModuleObjectBuilderStreaming::WasmModuleObjectBuilderStreaming(
+    WasmModuleObjectBuilderStreaming&& src)
+    : isolate_(std::move(src.isolate_))
+    , promise_(std::move(src.promise_))
+    , received_buffers_(std::move(src.received_buffers_))
+    , total_size_(std::move(src.total_size_)) {}
+
+WasmModuleObjectBuilderStreaming& WasmModuleObjectBuilderStreaming::operator=(
+    WasmModuleObjectBuilderStreaming&& src) {
+  isolate_ = std::move(src.isolate_);
+  promise_ = std::move(src.promise_);
+  received_buffers_ = std::move(src.received_buffers_);
+  total_size_ = std::move(src.total_size_);
+  return *this;
+}
+
 Local<Promise> WasmModuleObjectBuilderStreaming::GetPromise() {
   return promise_.Get(isolate_);
 }
@@ -7871,6 +7899,17 @@ WasmModuleObjectBuilderStreaming::~WasmModuleObjectBuilderStreaming() {
   promise_.Reset();
 }
 
+WasmModuleObjectBuilder::WasmModuleObjectBuilder(WasmModuleObjectBuilder&& src)
+    : received_buffers_(std::move(src.received_buffers_))
+    , total_size_(std::move(src.total_size_)) {}
+
+WasmModuleObjectBuilder&
+WasmModuleObjectBuilder::operator=(WasmModuleObjectBuilder&& src) {
+  received_buffers_ = std::move(src.received_buffers_);
+  total_size_ = std::move(src.total_size_);
+  return *this;
+}
+
 void WasmModuleObjectBuilder::OnBytesReceived(const uint8_t* bytes,
                                               size_t size) {
   std::unique_ptr<uint8_t[]> cloned_bytes(new uint8_t[size]);