diff --git a/lib/ckb/serializers/code_hash_serializer.rb b/lib/ckb/serializers/code_hash_serializer.rb
index 867cf563..d6ef8663 100644
--- a/lib/ckb/serializers/code_hash_serializer.rb
+++ b/lib/ckb/serializers/code_hash_serializer.rb
@@ -7,19 +7,23 @@ class CodeHashSerializer
 
       # @param code_hash [String]
       def initialize(code_hash)
-        @byte32_serializer = Byte32Serializer.new(code_hash)
+        @item = if code_hash
+                  code_hash.start_with?("0x") ? code_hash[2..-1] : code_hash
+                else
+                  ""
+                end
       end
 
       private
 
-      attr_reader :byte32_serializer
+      attr_reader :item
 
       def layout
         body
       end
 
       def body
-        byte32_serializer.serialize[2..-1]
+        item
       end
     end
   end
diff --git a/lib/ckb/serializers/header_dep_serializer.rb b/lib/ckb/serializers/header_dep_serializer.rb
index dcc14b0b..a0226989 100644
--- a/lib/ckb/serializers/header_dep_serializer.rb
+++ b/lib/ckb/serializers/header_dep_serializer.rb
@@ -7,19 +7,23 @@ class HeaderDepSerializer
 
       # @param header_dep [String]
       def initialize(header_dep)
-        @byte32_serializer = Byte32Serializer.new(header_dep)
+        @item = if header_dep
+                  header_dep.start_with?("0x") ? header_dep[2..-1] : header_dep
+                else
+                  ""
+                end
       end
 
       private
 
-      attr_reader :byte32_serializer
+      attr_reader :item
 
       def layout
         body
       end
 
       def body
-        byte32_serializer.serialize[2..-1]
+        item
       end
     end
   end
diff --git a/lib/ckb/serializers/out_point_tx_hash_serializer.rb b/lib/ckb/serializers/out_point_tx_hash_serializer.rb
index 9805de3e..9d8e6684 100644
--- a/lib/ckb/serializers/out_point_tx_hash_serializer.rb
+++ b/lib/ckb/serializers/out_point_tx_hash_serializer.rb
@@ -7,19 +7,23 @@ class OutPointTxHashSerializer
 
       # @param tx_hash [String]
       def initialize(tx_hash)
-        @byte32_serializer = Byte32Serializer.new(tx_hash)
+        @item = if tx_hash
+                  tx_hash.start_with?("0x") ? tx_hash[2..-1] : tx_hash
+                else
+                  ""
+                end
       end
 
       private
 
-      attr_reader :byte32_serializer
+      attr_reader :item
 
       def layout
         body
       end
 
       def body
-        byte32_serializer.serialize[2..-1]
+        item
       end
     end
   end