2 files changed, 17 insertions, 7 deletions
diff --git a/src/gleam/json.gleam b/src/gleam/json.gleam
index 3c50712..9aadcda 100644
--- a/src/gleam/json.gleam
+++ b/src/gleam/json.gleam
@@ -1,16 +1,16 @@
-import gleam/list
-import gleam/result
 import gleam/bit_array
-import gleam/option.{type Option, None, Some}
 import gleam/dynamic.{type Dynamic}
+import gleam/list
+import gleam/option.{type Option, None, Some}
+import gleam/result
 import gleam/string_builder.{type StringBuilder}
 
 pub type Json
 
 pub type DecodeError {
   UnexpectedEndOfInput
-  UnexpectedByte(byte: String, position: Int)
-  UnexpectedSequence(byte: String, position: Int)
+  UnexpectedByte(String)
+  UnexpectedSequence(String)
   UnexpectedFormat(List(dynamic.DecodeError))
 }
 
@@ -101,7 +101,7 @@ fn decode_to_dynamic(a: BitArray) -> Result(Dynamic, DecodeError)
 fn decode_to_dynamic(json: BitArray) -> Result(Dynamic, DecodeError) {
   case bit_array.to_string(json) {
     Ok(string) -> decode_string(string)
-    Error(Nil) -> Error(UnexpectedByte("", 0))
+    Error(Nil) -> Error(UnexpectedByte(""))
   }
 }
 
diff --git a/src/gleam_json_ffi.erl b/src/gleam_json_ffi.erl
index c33f87f..2bfd6c6 100644
--- a/src/gleam_json_ffi.erl
+++ b/src/gleam_json_ffi.erl
@@ -6,7 +6,17 @@
 ]).
 
 decode(Json) ->
-    thoas:decode(Json).
+    try
+        {ok, json:decode(Json)}
+    catch
+        error:unexpected_end -> {error, unexpected_end_of_input};
+        error:{invalid_byte, Byte} -> {error, {unexpected_byte, hex(Byte)}};
+        error:{unexpected_sequence, Byte} -> {error, {unexpected_sequence, Byte}}
+    end.
+
+hex(I) ->
+    H = list_to_binary(integer_to_list(I, 16)),
+    <<"0x"/utf8, H/binary>>.
 
 json_to_iodata(Json) ->
     Json.