diff --git a/implementations/plugin-rust/build/wrap.wasm b/implementations/plugin-rust/build/wrap.wasm
index b11f732d..3bd1f623 100755
Binary files a/implementations/plugin-rust/build/wrap.wasm and b/implementations/plugin-rust/build/wrap.wasm differ
diff --git a/implementations/plugin-rust/src/__tests__/cases/000-sanity/output/module.rs b/implementations/plugin-rust/src/__tests__/cases/000-sanity/output/module.rs
index db0deb79..59830fdf 100644
--- a/implementations/plugin-rust/src/__tests__/cases/000-sanity/output/module.rs
+++ b/implementations/plugin-rust/src/__tests__/cases/000-sanity/output/module.rs
@@ -4,6 +4,15 @@
 use std::sync::Arc;
 use polywrap_core::invoke::Invoker;
 use polywrap_plugin::{error::PluginError, module::PluginModule};
+use polywrap_msgpack_serde::{
+  to_vec,
+  from_slice,
+  BigIntWrapper,
+  BigNumber,
+  JSONString,
+  bytes
+};
+use std::collections::BTreeMap;
 use serde::{Serialize, Deserialize};
 use super::types::*;
 
@@ -19,15 +28,15 @@ pub struct ArgsModuleMethod {
     pub enum_array: Vec<CustomEnum>,
     #[serde(rename = "optEnumArray")]
     pub opt_enum_array: Option<Vec<Option<CustomEnum>>>,
-    pub map: Map<String, i32>,
+    pub map: BTreeMap<String, i32>,
     #[serde(rename = "mapOfArr")]
-    pub map_of_arr: Map<String, Vec<i32>>,
+    pub map_of_arr: BTreeMap<String, Vec<i32>>,
     #[serde(rename = "mapOfMap")]
-    pub map_of_map: Map<String, Map<String, i32>>,
+    pub map_of_map: BTreeMap<String, BTreeMap<String, i32>>,
     #[serde(rename = "mapOfObj")]
-    pub map_of_obj: Map<String, AnotherType>,
+    pub map_of_obj: BTreeMap<String, AnotherType>,
     #[serde(rename = "mapOfArrOfObj")]
-    pub map_of_arr_of_obj: Map<String, Vec<AnotherType>>,
+    pub map_of_arr_of_obj: BTreeMap<String, Vec<AnotherType>>,
 }
 
 #[derive(Clone, Debug, Deserialize, Serialize)]
diff --git a/implementations/plugin-rust/src/__tests__/cases/000-sanity/output/types.rs b/implementations/plugin-rust/src/__tests__/cases/000-sanity/output/types.rs
index fe3c1855..74cd3da5 100644
--- a/implementations/plugin-rust/src/__tests__/cases/000-sanity/output/types.rs
+++ b/implementations/plugin-rust/src/__tests__/cases/000-sanity/output/types.rs
@@ -4,8 +4,16 @@
 // NOTE: This is an auto-generated file.
 //       All modifications will be overwritten.
 use polywrap_core::{invoke::Invoker, uri::Uri};
-use polywrap_msgpack::{decode, serialize};
-use polywrap_plugin::{error::PluginError, BigInt, BigNumber, Map, JSON};
+use polywrap_plugin::error::PluginError;
+use polywrap_msgpack_serde::{
+  to_vec,
+  from_slice,
+  BigIntWrapper,
+  BigNumber,
+  JSONString,
+  bytes
+};
+use std::collections::BTreeMap;
 use serde::{Serialize, Deserialize};
 use std::sync::Arc;
 
@@ -17,7 +25,7 @@ pub struct Env {
     #[serde(rename = "optProp")]
     pub opt_prop: Option<String>,
     #[serde(rename = "optMap")]
-    pub opt_map: Option<Map<String, Option<i32>>>,
+    pub opt_map: Option<BTreeMap<String, Option<i32>>>,
 }
 // Env END //
 
@@ -38,18 +46,18 @@ pub struct CustomType {
     pub i8: i8,
     pub i16: i16,
     pub i32: i32,
-    pub bigint: BigInt,
+    pub bigint: BigIntWrapper,
     #[serde(rename = "optBigint")]
-    pub opt_bigint: Option<BigInt>,
+    pub opt_bigint: Option<BigIntWrapper>,
     pub bignumber: BigNumber,
     #[serde(rename = "optBignumber")]
     pub opt_bignumber: Option<BigNumber>,
-    pub json: JSON::Value,
+    pub json: JSONString,
     #[serde(rename = "optJson")]
-    pub opt_json: Option<JSON::Value>,
-    #[serde(with = "serde_bytes")]
+    pub opt_json: Option<JSONString>,
+    #[serde(with = "bytes")]
     pub bytes: Vec<u8>,
-    #[serde(with = "serde_bytes")]
+    #[serde(with = "bytes")]
     #[serde(rename = "optBytes")]
     pub opt_bytes: Option<Vec<u8>>,
     pub boolean: bool,
@@ -84,15 +92,15 @@ pub struct CustomType {
     pub enum_array: Vec<CustomEnum>,
     #[serde(rename = "optEnumArray")]
     pub opt_enum_array: Option<Vec<Option<CustomEnum>>>,
-    pub map: Map<String, i32>,
+    pub map: BTreeMap<String, i32>,
     #[serde(rename = "mapOfArr")]
-    pub map_of_arr: Map<String, Vec<i32>>,
+    pub map_of_arr: BTreeMap<String, Vec<i32>>,
     #[serde(rename = "mapOfObj")]
-    pub map_of_obj: Map<String, AnotherType>,
+    pub map_of_obj: BTreeMap<String, AnotherType>,
     #[serde(rename = "mapOfArrOfObj")]
-    pub map_of_arr_of_obj: Map<String, Vec<AnotherType>>,
+    pub map_of_arr_of_obj: BTreeMap<String, Vec<AnotherType>>,
     #[serde(rename = "mapCustomValue")]
-    pub map_custom_value: Map<String, Option<CustomMapValue>>,
+    pub map_custom_value: BTreeMap<String, Option<CustomMapValue>>,
 }
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct AnotherType {
@@ -228,7 +236,7 @@ impl<'a> TestImportModule<'a> {
 
     pub fn imported_method(&self, args: &TestImportModuleArgsImportedMethod) -> Result<Option<TestImportObject>, PluginError> {
         let uri = self.uri;
-        let serialized_args = serialize(args.clone()).unwrap();
+        let serialized_args = to_vec(args.clone()).unwrap();
         let result = invoker.invoke_raw(
             uri,
             "importedMethod",
@@ -243,12 +251,12 @@ impl<'a> TestImportModule<'a> {
             exception: e.to_string(),
         })?;
 
-        Ok(Some(decode(result.as_slice())?))
+        Ok(Some(from_slice(result.as_slice())?))
     }
 
     pub fn another_method(&self, args: &TestImportModuleArgsAnotherMethod) -> Result<i32, PluginError> {
         let uri = self.uri;
-        let serialized_args = serialize(args.clone()).unwrap();
+        let serialized_args = to_vec(args.clone()).unwrap();
         let result = invoker.invoke_raw(
             uri,
             "anotherMethod",
@@ -263,12 +271,12 @@ impl<'a> TestImportModule<'a> {
             exception: e.to_string(),
         })?;
 
-        Ok(decode(result.as_slice())?)
+        Ok(from_slice(result.as_slice())?)
     }
 
     pub fn returns_array_of_enums(&self, args: &TestImportModuleArgsReturnsArrayOfEnums) -> Result<Vec<Option<TestImportEnumReturn>>, PluginError> {
         let uri = self.uri;
-        let serialized_args = serialize(args.clone()).unwrap();
+        let serialized_args = to_vec(args.clone()).unwrap();
         let result = invoker.invoke_raw(
             uri,
             "returnsArrayOfEnums",
@@ -283,7 +291,7 @@ impl<'a> TestImportModule<'a> {
             exception: e.to_string(),
         })?;
 
-        Ok(decode(result.as_slice())?)
+        Ok(from_slice(result.as_slice())?)
     }
 }
 // Imported Modules END //
diff --git a/implementations/plugin-rust/src/__tests__/cases/001-module-functions/output/module.rs b/implementations/plugin-rust/src/__tests__/cases/001-module-functions/output/module.rs
index 5c556535..547fe0b2 100644
--- a/implementations/plugin-rust/src/__tests__/cases/001-module-functions/output/module.rs
+++ b/implementations/plugin-rust/src/__tests__/cases/001-module-functions/output/module.rs
@@ -4,6 +4,15 @@
 use std::sync::Arc;
 use polywrap_core::invoke::Invoker;
 use polywrap_plugin::{error::PluginError, module::PluginModule};
+use polywrap_msgpack_serde::{
+  to_vec,
+  from_slice,
+  BigIntWrapper,
+  BigNumber,
+  JSONString,
+  bytes
+};
+use std::collections::BTreeMap;
 use serde::{Serialize, Deserialize};
 use super::types::*;
 
@@ -16,7 +25,7 @@ pub struct ArgsFunction1 {
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct ArgsFunction2 {
     pub arg1: Option<i32>,
-    #[serde(with = "serde_bytes")]
+    #[serde(with = "bytes")]
     pub arg2: Option<Vec<u8>>,
 }
 
diff --git a/implementations/plugin-rust/src/__tests__/cases/001-module-functions/output/types.rs b/implementations/plugin-rust/src/__tests__/cases/001-module-functions/output/types.rs
index a52e57b5..76b5f16e 100644
--- a/implementations/plugin-rust/src/__tests__/cases/001-module-functions/output/types.rs
+++ b/implementations/plugin-rust/src/__tests__/cases/001-module-functions/output/types.rs
@@ -4,8 +4,16 @@
 // NOTE: This is an auto-generated file.
 //       All modifications will be overwritten.
 use polywrap_core::{invoke::Invoker, uri::Uri};
-use polywrap_msgpack::{decode, serialize};
-use polywrap_plugin::{error::PluginError, BigInt, BigNumber, Map, JSON};
+use polywrap_plugin::error::PluginError;
+use polywrap_msgpack_serde::{
+  to_vec,
+  from_slice,
+  BigIntWrapper,
+  BigNumber,
+  JSONString,
+  bytes
+};
+use std::collections::BTreeMap;
 use serde::{Serialize, Deserialize};
 
 // Env START //
diff --git a/implementations/plugin-rust/src/__tests__/cases/002-object-types/output/module.rs b/implementations/plugin-rust/src/__tests__/cases/002-object-types/output/module.rs
index 78a190e2..4e591a39 100644
--- a/implementations/plugin-rust/src/__tests__/cases/002-object-types/output/module.rs
+++ b/implementations/plugin-rust/src/__tests__/cases/002-object-types/output/module.rs
@@ -4,6 +4,15 @@
 use std::sync::Arc;
 use polywrap_core::invoke::Invoker;
 use polywrap_plugin::{error::PluginError, module::PluginModule};
+use polywrap_msgpack_serde::{
+  to_vec,
+  from_slice,
+  BigIntWrapper,
+  BigNumber,
+  JSONString,
+  bytes
+};
+use std::collections::BTreeMap;
 use serde::{Serialize, Deserialize};
 use super::types::*;
 
diff --git a/implementations/plugin-rust/src/__tests__/cases/002-object-types/output/types.rs b/implementations/plugin-rust/src/__tests__/cases/002-object-types/output/types.rs
index 8bdeb0df..05c9ee5f 100644
--- a/implementations/plugin-rust/src/__tests__/cases/002-object-types/output/types.rs
+++ b/implementations/plugin-rust/src/__tests__/cases/002-object-types/output/types.rs
@@ -4,8 +4,16 @@
 // NOTE: This is an auto-generated file.
 //       All modifications will be overwritten.
 use polywrap_core::{invoke::Invoker, uri::Uri};
-use polywrap_msgpack::{decode, serialize};
-use polywrap_plugin::{error::PluginError, BigInt, BigNumber, Map, JSON};
+use polywrap_plugin::error::PluginError;
+use polywrap_msgpack_serde::{
+  to_vec,
+  from_slice,
+  BigIntWrapper,
+  BigNumber,
+  JSONString,
+  bytes
+};
+use std::collections::BTreeMap;
 use serde::{Serialize, Deserialize};
 
 // Env START //
@@ -29,18 +37,18 @@ pub struct CustomType {
     pub i8: i8,
     pub i16: i16,
     pub i32: i32,
-    pub bigint: BigInt,
+    pub bigint: BigIntWrapper,
     #[serde(rename = "optBigint")]
-    pub opt_bigint: Option<BigInt>,
+    pub opt_bigint: Option<BigIntWrapper>,
     pub bignumber: BigNumber,
     #[serde(rename = "optBignumber")]
     pub opt_bignumber: Option<BigNumber>,
-    pub json: JSON::Value,
+    pub json: JSONString,
     #[serde(rename = "optJson")]
-    pub opt_json: Option<JSON::Value>,
-    #[serde(with = "serde_bytes")]
+    pub opt_json: Option<JSONString>,
+    #[serde(with = "bytes")]
     pub bytes: Vec<u8>,
-    #[serde(with = "serde_bytes")]
+    #[serde(with = "bytes")]
     #[serde(rename = "optBytes")]
     pub opt_bytes: Option<Vec<u8>>,
     pub boolean: bool,
@@ -68,15 +76,15 @@ pub struct CustomType {
     pub object_array: Vec<AnotherType>,
     #[serde(rename = "optObjectArray")]
     pub opt_object_array: Option<Vec<Option<AnotherType>>>,
-    pub map: Map<String, i32>,
+    pub map: BTreeMap<String, i32>,
     #[serde(rename = "mapOfArr")]
-    pub map_of_arr: Map<String, Vec<i32>>,
+    pub map_of_arr: BTreeMap<String, Vec<i32>>,
     #[serde(rename = "mapOfObj")]
-    pub map_of_obj: Map<String, AnotherType>,
+    pub map_of_obj: BTreeMap<String, AnotherType>,
     #[serde(rename = "mapOfArrOfObj")]
-    pub map_of_arr_of_obj: Map<String, Vec<AnotherType>>,
+    pub map_of_arr_of_obj: BTreeMap<String, Vec<AnotherType>>,
     #[serde(rename = "mapCustomValue")]
-    pub map_custom_value: Map<String, Option<CustomMapValue>>,
+    pub map_custom_value: BTreeMap<String, Option<CustomMapValue>>,
 }
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct AnotherType {
diff --git a/implementations/plugin-rust/src/helpers/serde_annotate_if_bytes.rs b/implementations/plugin-rust/src/helpers/serde_annotate_if_bytes.rs
index 2305b54b..58a56d45 100644
--- a/implementations/plugin-rust/src/helpers/serde_annotate_if_bytes.rs
+++ b/implementations/plugin-rust/src/helpers/serde_annotate_if_bytes.rs
@@ -8,7 +8,7 @@ handlebars_helper!(serde_annotate_if_bytes: |val: Value| {
 
 pub fn _serde_annotate_if_bytes(val: &str) -> String {
     if val == "Bytes" {
-        return "#[serde(with = \"serde_bytes\")]\n    ".to_string();
+        return "#[serde(with = \"bytes\")]\n    ".to_string();
     }
     "".to_string()
 }
diff --git a/implementations/plugin-rust/src/helpers/to_rust.rs b/implementations/plugin-rust/src/helpers/to_rust.rs
index e19b1566..6eccbb05 100644
--- a/implementations/plugin-rust/src/helpers/to_rust.rs
+++ b/implementations/plugin-rust/src/helpers/to_rust.rs
@@ -38,9 +38,9 @@ pub fn _to_rust(value: &str) -> String {
         "String" => "String".to_string(),
         "Boolean" => "bool".to_string(),
         "Bytes" => "Vec<u8>".to_string(),
-        "BigInt" => "BigInt".to_string(),
+        "BigInt" => "BigIntWrapper".to_string(),
         "BigNumber" => "BigNumber".to_string(),
-        "JSON" => "JSON::Value".to_string(),
+        "JSON" => "JSONString".to_string(),
         _ => {
             if res.starts_with("Enum_") {
                 res = res.replacen("Enum_", "", 1);
@@ -64,7 +64,7 @@ pub fn _to_rust_map(value: &str, optional: bool) -> Result<String, String> {
     let (key_type, val_type) = map_types(value)?;
     let rs_key_type = _to_rust(&key_type);
     let rs_val_type = _to_rust(&val_type);
-    let rs_map = format!("Map<{}, {}>", &rs_key_type, &rs_val_type);
+    let rs_map = format!("BTreeMap<{}, {}>", &rs_key_type, &rs_val_type);
     Ok(_apply_optional(&rs_map, optional))
 }
 
diff --git a/implementations/plugin-rust/src/templates/module_rs.rs b/implementations/plugin-rust/src/templates/module_rs.rs
index 70d8dd43..29106f06 100644
--- a/implementations/plugin-rust/src/templates/module_rs.rs
+++ b/implementations/plugin-rust/src/templates/module_rs.rs
@@ -6,6 +6,15 @@ lazy_static! {
 use std::sync::Arc;
 use polywrap_core::invoke::Invoker;
 use polywrap_plugin::{error::PluginError, module::PluginModule};
+use polywrap_msgpack_serde::{
+  to_vec,
+  from_slice,
+  BigIntWrapper,
+  BigNumber,
+  JSONString,
+  bytes
+};
+use std::collections::BTreeMap;
 use serde::{Serialize, Deserialize};
 use super::types::*;
 
diff --git a/implementations/plugin-rust/src/templates/types_rs.rs b/implementations/plugin-rust/src/templates/types_rs.rs
index ede0b088..97110648 100644
--- a/implementations/plugin-rust/src/templates/types_rs.rs
+++ b/implementations/plugin-rust/src/templates/types_rs.rs
@@ -6,8 +6,16 @@ lazy_static! {
 // NOTE: This is an auto-generated file.
 //       All modifications will be overwritten.
 use polywrap_core::{invoke::Invoker, uri::Uri};
-use polywrap_msgpack::{decode, serialize};
-use polywrap_plugin::{error::PluginError, BigInt, BigNumber, Map, JSON};
+use polywrap_plugin::error::PluginError;
+use polywrap_msgpack_serde::{
+  to_vec,
+  from_slice,
+  BigIntWrapper,
+  BigNumber,
+  JSONString,
+  bytes
+};
+use std::collections::BTreeMap;
 use serde::{Serialize, Deserialize};
 {{#each importedModuleTypes}}
 use std::sync::Arc;
@@ -116,7 +124,7 @@ impl<'a> {{detect_keyword (to_upper type)}}<'a> {
     {{#each methods}}
     pub fn {{to_lower name}}(&self, args: &{{to_upper ../type}}Args{{to_upper name}}) -> Result<{{#with return}}{{to_rust (to_graphql_type this)}}{{/with}}, PluginError> {
         let uri = self.uri;
-        let serialized_args = serialize(args.clone()).unwrap();
+        let serialized_args = to_vec(args.clone()).unwrap();
         let result = invoker.invoke_raw(
             uri,
             "{{name}}",
@@ -131,7 +139,7 @@ impl<'a> {{detect_keyword (to_upper type)}}<'a> {
             exception: e.to_string(),
         })?;
 
-        Ok({{#with return}}{{#if required}}{{else}}Some({{/if}}{{/with}}decode(result.as_slice())?{{#with return}}{{#if required}}{{else}}){{/if}}{{/with}})
+        Ok({{#with return}}{{#if required}}{{else}}Some({{/if}}{{/with}}from_slice(result.as_slice())?{{#with return}}{{#if required}}{{else}}){{/if}}{{/with}})
     }
     {{#if (is_not_last @index ../methods)}}
 
@@ -152,7 +160,7 @@ impl {{detect_keyword (to_upper type)}} {
     {{#each methods}}
     let uri = {{to_upper ../type}}::URI;
     pub fn {{detect_keyword (to_lower name)}}(args: &{{to_upper ../type}}Args{{to_upper name}}, invoker: Arc<dyn Invoker>) -> Result<{{#with return}}{{to_rust (to_graphql_type this)}}{{/with}}, PluginError> {
-        let serialized_args = serialize(args.clone()).unwrap();
+        let serialized_args = to_vec(args.clone()).unwrap();
         let opt_args = Some(serialized_args.as_slice());
         let uri = Uri::try_from(uri).unwrap();
         let result = invoker.invoke_raw(
@@ -169,7 +177,7 @@ impl {{detect_keyword (to_upper type)}} {
             exception: e.to_string(),
         })?;
 
-        Ok({{#with return}}{{#if required}}{{else}}Some({{/if}}{{/with}}decode(result.as_slice())?{{#with return}}{{#if required}}{{else}}){{/if}}{{/with}})
+        Ok({{#with return}}{{#if required}}{{else}}Some({{/if}}{{/with}}from_slice(result.as_slice())?{{#with return}}{{#if required}}{{else}}){{/if}}{{/with}})
     }
     {{#if (is_not_last @index ../methods)}}