diff --git a/apps/explorer/lib/explorer/smart_contract/reader.ex b/apps/explorer/lib/explorer/smart_contract/reader.ex
index 16adc3b92a..3f20119eee 100644
--- a/apps/explorer/lib/explorer/smart_contract/reader.ex
+++ b/apps/explorer/lib/explorer/smart_contract/reader.ex
@@ -254,8 +254,16 @@ defmodule Explorer.SmartContract.Reader do
     response = Integer.parse(item)
 
     case response do
-      {integer, remainder_of_binary} when remainder_of_binary == "" -> integer
-      _ -> item
+      {integer, ""} ->
+        hex_encoding =
+          integer
+          |> :binary.encode_unsigned()
+          |> Base.encode16(case: :lower)
+
+        "0x" <> hex_encoding
+
+      _ ->
+        item
     end
   end
 
diff --git a/apps/explorer/test/explorer/smart_contract/reader_test.exs b/apps/explorer/test/explorer/smart_contract/reader_test.exs
index 8d9d27c288..188570607a 100644
--- a/apps/explorer/test/explorer/smart_contract/reader_test.exs
+++ b/apps/explorer/test/explorer/smart_contract/reader_test.exs
@@ -214,10 +214,12 @@ defmodule Explorer.SmartContract.ReaderTest do
 
   describe "normalize_args/1" do
     test "converts argument when is a number" do
-      assert [0] = Reader.normalize_args(["0"])
+      assert ["0x00"] = Reader.normalize_args(["0"])
 
       assert ["0x798465571ae21a184a272f044f991ad1d5f87a3f"] =
                Reader.normalize_args(["0x798465571ae21a184a272f044f991ad1d5f87a3f"])
+
+      assert ["0x7b"] = Reader.normalize_args(["123"])
     end
 
     test "converts argument when is a boolean" do