diff --git a/gleam.toml b/gleam.toml
index 2052573..b44d943 100644
--- a/gleam.toml
+++ b/gleam.toml
@@ -11,7 +11,7 @@ description = "A package for keeping your encoders and decoders in sync."
 
 [dependencies]
 gleam_stdlib = "~> 0.31"
-gleam_json = "~> 1.0"
+gleam_json = ">= 2.0.0 and < 3.0.0"
 
 [dev-dependencies]
 gleeunit = "~> 1.0"
diff --git a/manifest.toml b/manifest.toml
index bfa9868..bf12adb 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -2,13 +2,12 @@
 # You typically do not need to edit this file
 
 packages = [
-  { name = "gleam_json", version = "0.7.0", build_tools = ["gleam"], requirements = ["thoas", "gleam_stdlib"], otp_app = "gleam_json", source = "hex", outer_checksum = "CB405BD93A8828BCD870463DE29375E7B2D252D9D124C109E5B618AAC00B86FC" },
-  { name = "gleam_stdlib", version = "0.35.1", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "5443EEB74708454B65650FEBBB1EF5175057D1DEC62AEA9D7C6D96F41DA79152" },
-  { name = "gleeunit", version = "1.0.2", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "D364C87AFEB26BDB4FB8A5ABDE67D635DC9FA52D6AB68416044C35B096C6882D" },
-  { name = "thoas", version = "0.4.1", build_tools = ["rebar3"], requirements = [], otp_app = "thoas", source = "hex", outer_checksum = "4918D50026C073C4AB1388437132C77A6F6F7C8AC43C60C13758CC0ADCE2134E" },
+  { name = "gleam_json", version = "2.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_json", source = "hex", outer_checksum = "0A57FB5666E695FD2BEE74C0428A98B0FC11A395D2C7B4CDF5E22C5DD32C74C6" },
+  { name = "gleam_stdlib", version = "0.49.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "A7DB09F15738198A87255425FBCE049B4B84C77CC522786DC923DABA73911F13" },
+  { name = "gleeunit", version = "1.2.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "F7A7228925D3EE7D0813C922E062BFD6D7E9310F0BEE585D3A42F3307E3CFD13" },
 ]
 
 [requirements]
-gleam_json = { version = "~> 0.5" }
+gleam_json = { version = ">= 2.0.0 and < 3.0.0" }
 gleam_stdlib = { version = "~> 0.31" }
 gleeunit = { version = "~> 1.0" }
diff --git a/src/gleam_community/codec.gleam b/src/gleam_community/codec.gleam
index 87b67d3..df40561 100644
--- a/src/gleam_community/codec.gleam
+++ b/src/gleam_community/codec.gleam
@@ -1,17 +1,17 @@
 // IMPORTS ---------------------------------------------------------------------
 
+import gleam/dict.{type Dict}
 import gleam/dynamic.{
   type DecodeError as DynamicError, type Dynamic, DecodeError as DynamicError,
 }
 import gleam/function
+import gleam/int
 import gleam/json.{type DecodeError as JsonError, type Json}
 import gleam/list
-import gleam/dict.{type Dict}
 import gleam/option.{type Option}
 import gleam/pair
 import gleam/result
-import gleam/string_builder.{type StringBuilder}
-import gleam/int
+import gleam/string_tree.{type StringTree}
 
 // TYPES -----------------------------------------------------------------------
 
@@ -567,7 +567,7 @@ pub fn encode_string(value: a, codec: Codec(a)) -> String {
 
 ///
 ///
-pub fn encode_string_custom_from(value: a, codec: Codec(a)) -> StringBuilder {
+pub fn encode_string_custom_from(value: a, codec: Codec(a)) -> StringTree {
   codec.encode(value)
   |> json.to_string_builder
 }