diff --git a/lib/ckb/serializers/arg_serializer.rb b/lib/ckb/serializers/arg_serializer.rb
index a4645f22..2635279f 100644
--- a/lib/ckb/serializers/arg_serializer.rb
+++ b/lib/ckb/serializers/arg_serializer.rb
@@ -7,7 +7,8 @@ class ArgSerializer
 
       # @param arg [String]
       def initialize(arg)
-        @bytes_serializer = BytesSerializer.new(arg)
+        items = arg.delete_prefix("0x").scan(/../)
+        @bytes_serializer = FixVecSerializer.new(items, ByteSerializer)
       end
 
       private
diff --git a/lib/ckb/serializers/byte32_serializer.rb b/lib/ckb/serializers/byte32_serializer.rb
index 0058b297..69db1adf 100644
--- a/lib/ckb/serializers/byte32_serializer.rb
+++ b/lib/ckb/serializers/byte32_serializer.rb
@@ -19,7 +19,8 @@ def layout
       end
 
       def body
-        value
+        items = value.delete_prefix("0x").scan(/../)
+        items.map { |item| ByteSerializer.new(item).serialize }.join("")
       end
     end
   end
diff --git a/lib/ckb/serializers/bytes_serializer.rb b/lib/ckb/serializers/byte_serializer.rb
similarity index 65%
rename from lib/ckb/serializers/bytes_serializer.rb
rename to lib/ckb/serializers/byte_serializer.rb
index da229648..d991098c 100644
--- a/lib/ckb/serializers/bytes_serializer.rb
+++ b/lib/ckb/serializers/byte_serializer.rb
@@ -2,8 +2,8 @@
 
 module CKB
   module Serializers
-    class BytesSerializer
-      include FixVecSerializer
+    class ByteSerializer
+      include BaseSerializer
 
       # @param value [String]
       def initialize(value)
@@ -13,11 +13,13 @@ def initialize(value)
 
       private
 
-      attr_reader :value, :items_count
+      attr_reader :value
 
-      def item_layouts
-        return "" if value.nil?
+      def layout
+        body
+      end
 
+      def body
         value
       end
     end
diff --git a/lib/ckb/serializers/fix_vec_serializer.rb b/lib/ckb/serializers/fix_vec_serializer.rb
index f9434f4b..0bb87bbc 100644
--- a/lib/ckb/serializers/fix_vec_serializer.rb
+++ b/lib/ckb/serializers/fix_vec_serializer.rb
@@ -1,10 +1,18 @@
 module CKB
   module Serializers
-    module FixVecSerializer
+    class FixVecSerializer
       include BaseSerializer
 
+      def initialize(items, item_serializer)
+        @items = items
+        @items_count = items.count
+        @item_serializer = item_serializer
+      end
+
       private
 
+      attr_reader :items, :items_count, :item_serializer
+
       def layout
         header + body
       end
@@ -20,6 +28,12 @@ def body
       def body_capacity
         [body].pack("H*").bytesize
       end
+
+      def item_layouts
+        return "" if items_count == 0
+
+        items.map { |item| item_serializer.new(item).serialize }.join("")
+      end
     end
   end
 end
diff --git a/lib/ckb/serializers/header_deps_serializer.rb b/lib/ckb/serializers/header_deps_serializer.rb
deleted file mode 100644
index 2e304d60..00000000
--- a/lib/ckb/serializers/header_deps_serializer.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-# frozen_string_literal: true
-
-module CKB
-  module Serializers
-    class HeaderDepsSerializer
-      include FixVecSerializer
-
-      # @param header_deps [String[]]
-      def initialize(header_deps)
-        @header_deps = header_deps
-        @items_count = header_deps.count
-      end
-
-      private
-
-      attr_reader :header_deps, :items_count
-
-      def item_layouts
-        return "" if items_count == 0
-
-        header_deps.map { |header_dep| HeaderDepSerializer.new(header_dep).serialize }.join("")
-      end
-    end
-  end
-end
diff --git a/lib/ckb/serializers/output_data_serializer.rb b/lib/ckb/serializers/output_data_serializer.rb
index 91b1efdc..a6aa525e 100644
--- a/lib/ckb/serializers/output_data_serializer.rb
+++ b/lib/ckb/serializers/output_data_serializer.rb
@@ -7,7 +7,8 @@ class OutputDataSerializer
 
       # @param output_data [String]
       def initialize(output_data)
-        @bytes_serializer = BytesSerializer.new(output_data)
+        items = output_data.delete_prefix("0x").scan(/../)
+        @bytes_serializer = FixVecSerializer.new(items, ByteSerializer)
       end
 
       private
diff --git a/lib/ckb/serializers/raw_transaction_serializer.rb b/lib/ckb/serializers/raw_transaction_serializer.rb
index 7c467c75..3d7a701e 100644
--- a/lib/ckb/serializers/raw_transaction_serializer.rb
+++ b/lib/ckb/serializers/raw_transaction_serializer.rb
@@ -9,7 +9,7 @@ class RawTransactionSerializer
       def initialize(transaction)
         @version_serializer = VersionSerializer.new(transaction.version)
         @cell_deps_serializer = DynVecSerializer.new(transaction.cell_deps, CellDepSerializer)
-        @header_deps_serializer = HeaderDepsSerializer.new(transaction.header_deps)
+        @header_deps_serializer = FixVecSerializer.new(transaction.header_deps, HeaderDepSerializer)
         @inputs_serializer = DynVecSerializer.new(transaction.inputs, InputSerializer)
         @outputs_serializer = DynVecSerializer.new(transaction.outputs, OutputSerializer)
         @outputs_data_serializer = DynVecSerializer.new(transaction.outputs_data, OutputDataSerializer)
diff --git a/lib/ckb/serializers/serializers.rb b/lib/ckb/serializers/serializers.rb
index 648b5586..282d92ee 100644
--- a/lib/ckb/serializers/serializers.rb
+++ b/lib/ckb/serializers/serializers.rb
@@ -7,14 +7,13 @@
 require_relative "uint32_serializer"
 require_relative "uint64_serializer"
 require_relative "byte32_serializer"
-require_relative "bytes_serializer"
+require_relative "byte_serializer"
 require_relative "code_hash_serializer"
 require_relative "hash_type_serializer"
 require_relative "arg_serializer"
 require_relative "script_serializer"
 require_relative "version_serializer"
 require_relative "header_dep_serializer"
-require_relative "header_deps_serializer"
 require_relative "dep_type_serializer"
 require_relative "cell_dep_serializer"
 require_relative "since_serializer"