diff --git a/core/Cargo.toml b/core/Cargo.toml
index a890298d17..fb7b0475c3 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -16,7 +16,6 @@ publish = true
 [dependencies]
 anyhow = "1"
 async-trait = "0.1"
-beef = { version = "0.5.1", features = ["impl_serde"] }
 jsonrpsee-types = { workspace = true }
 thiserror = "1"
 serde = { version = "1.0", default-features = false, features = ["derive"] }
diff --git a/core/src/lib.rs b/core/src/lib.rs
index 31f6dacc80..075ddd5cde 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -81,12 +81,12 @@ pub mod __reexports {
 	}
 }
 
-pub use beef::Cow;
 pub use serde::{de::DeserializeOwned, Serialize};
 pub use serde_json::{
 	to_value as to_json_value, value::to_raw_value as to_json_raw_value, value::RawValue as JsonRawValue,
 	Value as JsonValue,
 };
+pub use std::borrow::Cow;
 
 /// Ten megabytes.
 pub const TEN_MB_SIZE_BYTES: u32 = 10 * 1024 * 1024;
diff --git a/tests/Cargo.toml b/tests/Cargo.toml
index 49bf5d3665..75be704047 100644
--- a/tests/Cargo.toml
+++ b/tests/Cargo.toml
@@ -9,7 +9,6 @@ publish = false
 
 [dev-dependencies]
 anyhow = "1"
-beef = { version = "0.5.1", features = ["impl_serde"] }
 fast-socks5 = { version = "0.9.1" }
 futures = { version = "0.3.14", default-features = false, features = ["std"] }
 futures-util = { version = "0.3.14", default-features = false, features = ["alloc"]}
diff --git a/tests/tests/proc_macros.rs b/tests/tests/proc_macros.rs
index 182481d01e..baf5f676b5 100644
--- a/tests/tests/proc_macros.rs
+++ b/tests/tests/proc_macros.rs
@@ -107,18 +107,14 @@ mod rpc_impl {
 			a: &str,
 			b: &'_ str,
 			c: std::borrow::Cow<'_, str>,
-			d: Option<beef::Cow<'_, str>>,
+			d: Option<std::borrow::Cow<'_, str>>,
 		) -> Result<String, ErrorObjectOwned> {
 			Ok(format!("Called with: {}, {}, {}, {:?}", a, b, c, d))
 		}
 
 		#[method(name = "zero_copy_cow")]
-		fn zero_copy_cow(
-			&self,
-			a: std::borrow::Cow<'_, str>,
-			b: beef::Cow<'_, str>,
-		) -> Result<String, ErrorObjectOwned> {
-			Ok(format!("Zero copy params: {}, {}", matches!(a, std::borrow::Cow::Borrowed(_)), b.is_borrowed()))
+		fn zero_copy_cow(&self, a: std::borrow::Cow<'_, str>) -> Result<String, ErrorObjectOwned> {
+			Ok(format!("Zero copy params: {}", matches!(a, std::borrow::Cow::Borrowed(_))))
 		}
 
 		#[method(name = "blocking_call", blocking)]
@@ -285,19 +281,19 @@ async fn macro_zero_copy_cow() {
 	let module = RpcServerImpl.into_rpc();
 
 	let (resp, _) = module
-		.raw_json_request(r#"{"jsonrpc":"2.0","method":"foo_zero_copy_cow","params":["foo", "bar"],"id":0}"#, 1)
+		.raw_json_request(r#"{"jsonrpc":"2.0","method":"foo_zero_copy_cow","params":["foo"],"id":0}"#, 1)
 		.await
 		.unwrap();
 
 	// std::borrow::Cow<str> always deserialized to owned variant here
-	assert_eq!(resp, r#"{"jsonrpc":"2.0","result":"Zero copy params: false, true","id":0}"#);
+	assert_eq!(resp, r#"{"jsonrpc":"2.0","result":"Zero copy params: false","id":0}"#);
 
 	// serde_json will have to allocate a new string to replace `\t` with byte 0x09 (tab)
 	let (resp, _) = module
-		.raw_json_request(r#"{"jsonrpc":"2.0","method":"foo_zero_copy_cow","params":["\tfoo", "\tbar"],"id":0}"#, 1)
+		.raw_json_request(r#"{"jsonrpc":"2.0","method":"foo_zero_copy_cow","params":["\tfoo"],"id":0}"#, 1)
 		.await
 		.unwrap();
-	assert_eq!(resp, r#"{"jsonrpc":"2.0","result":"Zero copy params: false, false","id":0}"#);
+	assert_eq!(resp, r#"{"jsonrpc":"2.0","result":"Zero copy params: false","id":0}"#);
 }
 
 // Disabled on MacOS as GH CI timings on Mac vary wildly (~100ms) making this test fail.
diff --git a/types/Cargo.toml b/types/Cargo.toml
index 9558061bc0..62039633b2 100644
--- a/types/Cargo.toml
+++ b/types/Cargo.toml
@@ -14,7 +14,6 @@ readme.workspace = true
 publish = true
 
 [dependencies]
-beef = { version = "0.5.1", features = ["impl_serde"] }
 serde = { version = "1", default-features = false, features = ["derive"] }
 serde_json = { version = "1", default-features = false, features = ["alloc", "raw_value", "std"] }
 thiserror = "1.0"
diff --git a/types/src/params.rs b/types/src/params.rs
index c86379b556..db97147808 100644
--- a/types/src/params.rs
+++ b/types/src/params.rs
@@ -27,9 +27,9 @@
 //! Types to handle JSON-RPC request parameters according to the [spec](https://www.jsonrpc.org/specification#parameter_structures).
 //! Some types come with a "*Ser" variant that implements [`serde::Serialize`]; these are used in the client.
 
+use std::borrow::Cow;
 use std::fmt;
 
-use beef::Cow;
 use serde::de::{self, Deserializer, Unexpected, Visitor};
 use serde::ser::Serializer;
 use serde::{Deserialize, Serialize};
@@ -139,7 +139,7 @@ impl<'a> Params<'a> {
 	///
 	/// This will cause an allocation if the params internally are using a borrowed JSON slice.
 	pub fn into_owned(self) -> Params<'static> {
-		Params(self.0.map(|s| Cow::owned(s.into_owned())))
+		Params(self.0.map(|s| Cow::Owned(s.into_owned())))
 	}
 
 	/// Return the length of underlying JSON string in number of bytes.
@@ -315,7 +315,7 @@ impl<'a> SubscriptionId<'a> {
 	pub fn into_owned(self) -> SubscriptionId<'static> {
 		match self {
 			SubscriptionId::Num(num) => SubscriptionId::Num(num),
-			SubscriptionId::Str(s) => SubscriptionId::Str(Cow::owned(s.into_owned())),
+			SubscriptionId::Str(s) => SubscriptionId::Str(Cow::Owned(s.into_owned())),
 		}
 	}
 }
@@ -382,7 +382,7 @@ impl<'a> Id<'a> {
 		match self {
 			Id::Null => Id::Null,
 			Id::Number(num) => Id::Number(num),
-			Id::Str(s) => Id::Str(Cow::owned(s.into_owned())),
+			Id::Str(s) => Id::Str(Cow::Owned(s.into_owned())),
 		}
 	}
 
@@ -421,7 +421,7 @@ mod test {
 		let deserialized: Id = serde_json::from_str(s).unwrap();
 		match deserialized {
 			Id::Str(ref cow) => {
-				assert!(cow.is_borrowed());
+				assert!(matches!(cow, Cow::Borrowed(_)));
 				assert_eq!(cow, "2");
 			}
 			_ => panic!("Expected Id::Str"),
@@ -433,7 +433,7 @@ mod test {
 
 		let s = r#""2x""#;
 		let deserialized: Id = serde_json::from_str(s).unwrap();
-		assert_eq!(deserialized, Id::Str(Cow::const_str("2x")));
+		assert_eq!(deserialized, Id::Str(Cow::Borrowed("2x")));
 
 		let s = r#"[1337]"#;
 		assert!(serde_json::from_str::<Id>(s).is_err());
diff --git a/types/src/request.rs b/types/src/request.rs
index 6cfd8dacc8..28026a0392 100644
--- a/types/src/request.rs
+++ b/types/src/request.rs
@@ -27,13 +27,12 @@
 //! Types to handle JSON-RPC requests according to the [spec](https://www.jsonrpc.org/specification#request-object).
 //! Some types come with a "*Ser" variant that implements [`serde::Serialize`]; these are used in the client.
 
-use std::borrow::Cow as StdCow;
+use std::borrow::Cow;
 
 use crate::{
 	params::{Id, TwoPointZero},
 	Params,
 };
-use beef::Cow;
 use http::Extensions;
 use serde::{Deserialize, Serialize};
 use serde_json::value::RawValue;
@@ -51,7 +50,7 @@ pub struct Request<'a> {
 	pub method: Cow<'a, str>,
 	/// Parameter values of the request.
 	#[serde(borrow)]
-	pub params: Option<StdCow<'a, RawValue>>,
+	pub params: Option<Cow<'a, RawValue>>,
 	/// The request's extensions.
 	#[serde(skip)]
 	pub extensions: Extensions,
@@ -60,7 +59,7 @@ pub struct Request<'a> {
 impl<'a> Request<'a> {
 	/// Create a new [`Request`].
 	pub fn new(method: Cow<'a, str>, params: Option<&'a RawValue>, id: Id<'a>) -> Self {
-		Self { jsonrpc: TwoPointZero, id, method, params: params.map(StdCow::Borrowed), extensions: Extensions::new() }
+		Self { jsonrpc: TwoPointZero, id, method, params: params.map(Cow::Borrowed), extensions: Extensions::new() }
 	}
 
 	/// Get the ID of the request.
@@ -129,7 +128,7 @@ pub struct RequestSer<'a> {
 	pub method: Cow<'a, str>,
 	/// Parameter values of the request.
 	#[serde(skip_serializing_if = "Option::is_none")]
-	pub params: Option<StdCow<'a, RawValue>>,
+	pub params: Option<Cow<'a, RawValue>>,
 }
 
 impl<'a> RequestSer<'a> {
@@ -139,13 +138,13 @@ impl<'a> RequestSer<'a> {
 			jsonrpc: TwoPointZero,
 			id: id.clone(),
 			method: method.as_ref().into(),
-			params: params.map(StdCow::Borrowed),
+			params: params.map(Cow::Borrowed),
 		}
 	}
 
 	/// Create a owned serializable JSON-RPC method call.
 	pub fn owned(id: Id<'a>, method: impl Into<String>, params: Option<Box<RawValue>>) -> Self {
-		Self { jsonrpc: TwoPointZero, id, method: method.into().into(), params: params.map(StdCow::Owned) }
+		Self { jsonrpc: TwoPointZero, id, method: method.into().into(), params: params.map(Cow::Owned) }
 	}
 }
 
@@ -159,24 +158,24 @@ pub struct NotificationSer<'a> {
 	pub method: Cow<'a, str>,
 	/// Parameter values of the request.
 	#[serde(skip_serializing_if = "Option::is_none")]
-	pub params: Option<StdCow<'a, RawValue>>,
+	pub params: Option<Cow<'a, RawValue>>,
 }
 
 impl<'a> NotificationSer<'a> {
 	/// Create a borrowed serializable JSON-RPC notification.
 	pub fn borrowed(method: &'a impl AsRef<str>, params: Option<&'a RawValue>) -> Self {
-		Self { jsonrpc: TwoPointZero, method: method.as_ref().into(), params: params.map(StdCow::Borrowed) }
+		Self { jsonrpc: TwoPointZero, method: method.as_ref().into(), params: params.map(Cow::Borrowed) }
 	}
 
 	/// Create an owned serializable JSON-RPC notification.
 	pub fn owned(method: impl Into<String>, params: Option<Box<RawValue>>) -> Self {
-		Self { jsonrpc: TwoPointZero, method: method.into().into(), params: params.map(StdCow::Owned) }
+		Self { jsonrpc: TwoPointZero, method: method.into().into(), params: params.map(Cow::Owned) }
 	}
 }
 
 #[cfg(test)]
 mod test {
-	use super::{Id, InvalidRequest, Notification, NotificationSer, Request, RequestSer, StdCow, TwoPointZero};
+	use super::{Cow, Id, InvalidRequest, Notification, NotificationSer, Request, RequestSer, TwoPointZero};
 	use serde_json::value::RawValue;
 
 	fn assert_request<'a>(request: Request<'a>, id: Id<'a>, method: &str, params: Option<&str>) {
@@ -278,7 +277,7 @@ mod test {
 				jsonrpc: TwoPointZero,
 				method: method.into(),
 				id: id.unwrap_or(Id::Null),
-				params: params.map(StdCow::Owned),
+				params: params.map(Cow::Owned),
 			})
 			.unwrap();