diff --git a/Cargo.toml b/Cargo.toml
index be9eff233..183496587 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -73,5 +73,3 @@ quote = "1.0"
 syn = { version = "1.0.105", features=["full", "extra-traits", "visit"] }
 base64 = "0.13.1"
 bigdecimal = "0.3.0"
-num-bigint = "0.4.3"
-serde_bytes = "0.11.5"
diff --git a/packages/client/Cargo.toml b/packages/client/Cargo.toml
index f24b5b455..695c03c63 100644
--- a/packages/client/Cargo.toml
+++ b/packages/client/Cargo.toml
@@ -18,10 +18,7 @@ wrap_manifest_schemas.workspace = true
 
 thiserror.workspace = true
 serde.workspace = true
-serde_json.workspace = true
-serde_bytes.workspace = true
 
 [dev-dependencies]
 polywrap_tests_utils.workspace = true
-bigdecimal.workspace = true
-num-bigint.workspace = true
\ No newline at end of file
+bigdecimal.workspace = true
\ No newline at end of file
diff --git a/packages/client/tests/it/wrap_types/bytes.rs b/packages/client/tests/it/wrap_types/bytes.rs
index b0571aa89..013730b68 100644
--- a/packages/client/tests/it/wrap_types/bytes.rs
+++ b/packages/client/tests/it/wrap_types/bytes.rs
@@ -1,7 +1,7 @@
 use polywrap_msgpack_serde::to_vec;
 use polywrap_tests_utils::helpers::get_tests_path;
 use serde::{Deserialize, Serialize};
-use serde_bytes::ByteBuf;
+use polywrap_msgpack_serde::bytes;
 
 use crate::wrap_types::get_client;
 
@@ -12,7 +12,7 @@ struct BytesMethodArgs {
 
 #[derive(Serialize, Deserialize)]
 struct Args {
-    #[serde(with = "serde_bytes")]
+    #[serde(with = "bytes")]
     prop: Vec<u8>,
 }
 
@@ -31,7 +31,7 @@ fn bytes_method() {
         },
     };
     let response = client
-        .invoke::<ByteBuf>(
+        .invoke::<bytes::ByteBuf>(
             &uri,
             "bytesMethod",
             Some(&to_vec(&args).unwrap()),
diff --git a/packages/client/tests/it/wrap_types/object.rs b/packages/client/tests/it/wrap_types/object.rs
index 88f05498d..2de425d84 100644
--- a/packages/client/tests/it/wrap_types/object.rs
+++ b/packages/client/tests/it/wrap_types/object.rs
@@ -1,6 +1,6 @@
 use polywrap_client::client::PolywrapClient;
 use polywrap_client::core::uri::Uri;
-use polywrap_msgpack_serde::to_vec;
+use polywrap_msgpack_serde::{to_vec, bytes};
 use polywrap_tests_utils::helpers::get_tests_path;
 use serde::{Deserialize, Serialize};
 
@@ -34,7 +34,7 @@ struct Arg2 {
 
 #[derive(Serialize)]
 struct Arg3 {
-    #[serde(with = "serde_bytes")]
+    #[serde(with = "bytes")]
     prop: Vec<u8>,
 }
 
diff --git a/packages/core/Cargo.toml b/packages/core/Cargo.toml
index 84bfdbaa1..e6dff10cf 100644
--- a/packages/core/Cargo.toml
+++ b/packages/core/Cargo.toml
@@ -14,7 +14,6 @@ wrap_manifest_schemas.workspace = true
 polywrap_msgpack_serde.workspace = true
 serde.workspace = true
 jsonschema.workspace = true
-serde_bytes.workspace = true
 polywrap_uri.workspace = true
 polywrap_core_macros = { workspace = true, optional = true }
 
diff --git a/packages/core/src/resolution/helpers.rs b/packages/core/src/resolution/helpers.rs
index f5e752648..8444a247b 100644
--- a/packages/core/src/resolution/helpers.rs
+++ b/packages/core/src/resolution/helpers.rs
@@ -4,9 +4,8 @@ use crate::{
     client::Client, error::Error, file_reader::FileReader,
     interface_implementation::InterfaceImplementations, invoker::Invoker, uri::Uri,
 };
-use polywrap_msgpack_serde::to_vec;
+use polywrap_msgpack_serde::{to_vec, bytes};
 use serde::Serialize;
-use serde_bytes::ByteBuf;
 
 fn combine_paths(a: &str, b: &str) -> String {
     let mut a = a.to_string();
@@ -63,7 +62,7 @@ impl FileReader for UriResolverExtensionFileReader {
             None,
         )?;
 
-        let result: ByteBuf = polywrap_msgpack_serde::from_slice(&result)?;
+        let result: bytes::ByteBuf = polywrap_msgpack_serde::from_slice(&result)?;
         Ok(result.into_vec())
     }
 }
diff --git a/packages/plugin/Cargo.toml b/packages/plugin/Cargo.toml
index 7967f3014..aaf223a4b 100644
--- a/packages/plugin/Cargo.toml
+++ b/packages/plugin/Cargo.toml
@@ -20,7 +20,6 @@ polywrap_plugin_implementor = { workspace = true, optional = true }
 
 serde.workspace = true
 bigdecimal.workspace = true
-num-bigint.workspace = true
 
 [features]
 default = ["implementor"]
diff --git a/packages/plugin/src/lib.rs b/packages/plugin/src/lib.rs
index c92bba038..0a01bc351 100644
--- a/packages/plugin/src/lib.rs
+++ b/packages/plugin/src/lib.rs
@@ -8,6 +8,5 @@ pub mod wrapper;
 pub use polywrap_plugin_implementor as implementor;
 
 pub use bigdecimal::BigDecimal as BigNumber;
-pub use num_bigint::BigInt;
 pub use polywrap_msgpack_serde::Map;
 pub use serde_json as JSON;
diff --git a/packages/plugins/fs/Cargo.toml b/packages/plugins/fs/Cargo.toml
index abc15b536..fe0579e4c 100644
--- a/packages/plugins/fs/Cargo.toml
+++ b/packages/plugins/fs/Cargo.toml
@@ -16,7 +16,6 @@ wrap_manifest_schemas.workspace = true
 serde.workspace = true
 
 rm_rf = "0.6.2"
-serde_bytes.workspace = true
 thiserror.workspace = true
 
 [dev-dependencies]
diff --git a/packages/plugins/fs/src/lib.rs b/packages/plugins/fs/src/lib.rs
index b63ea5287..44aecbd46 100644
--- a/packages/plugins/fs/src/lib.rs
+++ b/packages/plugins/fs/src/lib.rs
@@ -8,7 +8,7 @@ use wrap::module::{
     Module,
 };
 pub mod wrap;
-use serde_bytes::ByteBuf;
+use polywrap_msgpack_serde::bytes;
 
 #[derive(Debug)]
 pub struct FileSystemPlugin;
diff --git a/packages/plugins/fs/src/wrap/module.rs b/packages/plugins/fs/src/wrap/module.rs
index 70b32c578..b71e478d8 100644
--- a/packages/plugins/fs/src/wrap/module.rs
+++ b/packages/plugins/fs/src/wrap/module.rs
@@ -5,7 +5,6 @@ use std::sync::Arc;
 use polywrap_core::invoker::Invoker;
 use polywrap_plugin::{error::PluginError, module::PluginModule};
 use serde::{Serialize, Deserialize};
-use serde_bytes::ByteBuf;
 use super::types::*;
 
 #[derive(Clone, Debug, Deserialize, Serialize)]
@@ -27,7 +26,7 @@ pub struct ArgsExists {
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct ArgsWriteFile {
     pub path: String,
-    #[serde(with = "serde_bytes")]
+    #[serde(with = "bytes")]
     pub data: Vec<u8>,
 }
 
@@ -50,7 +49,7 @@ pub struct ArgsRmdir {
 }
 
 pub trait Module: PluginModule {
-  fn read_file(&mut self, args: &ArgsReadFile, invoker: Arc<dyn Invoker>) -> Result<ByteBuf, PluginError>;
+  fn read_file(&mut self, args: &ArgsReadFile, invoker: Arc<dyn Invoker>) -> Result<bytes::ByteBuf, PluginError>;
 
   fn read_file_as_string(&mut self, args: &ArgsReadFileAsString, invoker: Arc<dyn Invoker>) -> Result<String, PluginError>;
 
diff --git a/packages/plugins/fs/tests/it/main.rs b/packages/plugins/fs/tests/it/main.rs
index 9be85953f..30b41c0e7 100644
--- a/packages/plugins/fs/tests/it/main.rs
+++ b/packages/plugins/fs/tests/it/main.rs
@@ -6,7 +6,8 @@ use polywrap_resolvers::static_resolver::{StaticResolver, StaticResolverLike};
 
 use polywrap_plugin::package::PluginPackage;
 use serde::Serialize;
-use serde_bytes::ByteBuf;
+use polywrap_msgpack_serde::bytes;
+use polywrap_msgpack_serde::bytes::ByteBuf;
 use std::path::Path;
 use std::sync::Arc;
 use std::{env, fs};
@@ -206,7 +207,7 @@ fn should_return_whether_a_file_exists_or_not() {
 #[derive(Serialize)]
 struct WriteFileArgs {
     path: String,
-    #[serde(with = "serde_bytes")]
+    #[serde(with = "bytes")]
     data: Vec<u8>,
 }
 
diff --git a/packages/resolver-extensions/Cargo.toml b/packages/resolver-extensions/Cargo.toml
index 2233f475f..625485eae 100644
--- a/packages/resolver-extensions/Cargo.toml
+++ b/packages/resolver-extensions/Cargo.toml
@@ -15,7 +15,6 @@ polywrap_wasm.workspace = true
 polywrap_msgpack_serde.workspace = true
 polywrap_resolvers.workspace = true
 serde.workspace = true
-serde_bytes.workspace = true
 
 [dev-dependencies]
 polywrap_tests_utils.workspace = true
diff --git a/packages/resolver-extensions/src/uri_resolver_wrapper.rs b/packages/resolver-extensions/src/uri_resolver_wrapper.rs
index ed9034cd6..1312a68b6 100644
--- a/packages/resolver-extensions/src/uri_resolver_wrapper.rs
+++ b/packages/resolver-extensions/src/uri_resolver_wrapper.rs
@@ -14,6 +14,7 @@ use polywrap_core::{
 use polywrap_msgpack_serde::{from_slice, to_vec};
 use polywrap_wasm::wasm_package::WasmPackage;
 use serde::{Deserialize, Serialize};
+use polywrap_msgpack_serde::bytes;
 
 pub struct UriResolverWrapper {
     pub implementation_uri: Uri,
@@ -22,7 +23,7 @@ pub struct UriResolverWrapper {
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct MaybeUriOrManifest {
     pub uri: Option<String>,
-    #[serde(with = "serde_bytes")]
+    #[serde(with = "bytes")]
     pub manifest: Option<Vec<u8>>,
 }
 
diff --git a/packages/resolvers/Cargo.toml b/packages/resolvers/Cargo.toml
index 179d3f90d..cf9de5159 100644
--- a/packages/resolvers/Cargo.toml
+++ b/packages/resolvers/Cargo.toml
@@ -14,5 +14,4 @@ polywrap_core.workspace = true
 polywrap_wasm.workspace = true
 polywrap_msgpack_serde.workspace = true
 serde.workspace = true
-serde_bytes.workspace = true
 
diff --git a/packages/tests-utils/Cargo.toml b/packages/tests-utils/Cargo.toml
index 1fe1e59af..22c147973 100644
--- a/packages/tests-utils/Cargo.toml
+++ b/packages/tests-utils/Cargo.toml
@@ -14,10 +14,8 @@ polywrap_core.workspace = true
 wrap_manifest_schemas.workspace = true
 thiserror.workspace = true
 serde.workspace = true
-serde_json.workspace = true
 polywrap_plugin.workspace = true
 polywrap_msgpack_serde.workspace = true
-serde_bytes.workspace = true
 
 reqwest = { version = "0.11", features = ["json"] }
 tokio = { version = "1.23.0", features = ["full"] }
diff --git a/packages/tests-utils/src/mocks/invoker.rs b/packages/tests-utils/src/mocks/invoker.rs
index c8d241359..161b23cf8 100644
--- a/packages/tests-utils/src/mocks/invoker.rs
+++ b/packages/tests-utils/src/mocks/invoker.rs
@@ -9,11 +9,12 @@ use polywrap_core::{
 };
 use polywrap_msgpack_serde::to_vec;
 use serde::{Deserialize, Serialize};
+use polywrap_msgpack_serde::bytes;
 
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct MaybeUriOrManifest {
     pub uri: Option<String>,
-    #[serde(with = "serde_bytes")]
+    #[serde(with = "bytes")]
     pub manifest: Option<Vec<u8>>,
 }