diff --git a/crates/ruma-api/CHANGELOG.md b/crates/ruma-api/CHANGELOG.md
index 01c19785..f049d773 100644
--- a/crates/ruma-api/CHANGELOG.md
+++ b/crates/ruma-api/CHANGELOG.md
@@ -1,5 +1,10 @@
 # [unreleased]
 
+Breaking changes:
+
+* Remove the `RequestDeserializationError` and `ResponseDeserializationError`
+  types in favor of using `DeserializationError` directly
+
 # 0.18.5
 
 Bug fixes:
diff --git a/crates/ruma-api/src/error.rs b/crates/ruma-api/src/error.rs
index 4c060c26..eba3a91c 100644
--- a/crates/ruma-api/src/error.rs
+++ b/crates/ruma-api/src/error.rs
@@ -47,7 +47,7 @@ impl OutgoingResponse for MatrixError {
 impl EndpointError for MatrixError {
     fn try_from_http_response<T: AsRef<[u8]>>(
         response: http::Response<T>,
-    ) -> Result<Self, ResponseDeserializationError> {
+    ) -> Result<Self, DeserializationError> {
         Ok(Self {
             status_code: response.status(),
             body: from_json_slice(response.body().as_ref())?,
@@ -90,7 +90,7 @@ pub enum IntoHttpError {
 pub enum FromHttpRequestError {
     /// Deserialization failed
     #[error("deserialization failed: {0}")]
-    Deserialization(RequestDeserializationError),
+    Deserialization(DeserializationError),
 
     /// HTTP method mismatch
     #[error("http method mismatch: expected {expected}, received: {received}")]
@@ -103,27 +103,11 @@ pub enum FromHttpRequestError {
 }
 
 impl<T> From<T> for FromHttpRequestError
-where
-    T: Into<RequestDeserializationError>,
-{
-    fn from(err: T) -> Self {
-        Self::Deserialization(err.into())
-    }
-}
-
-/// An error that occurred when trying to deserialize a request.
-#[derive(Debug, Error)]
-#[error("{inner}")]
-pub struct RequestDeserializationError {
-    inner: DeserializationError,
-}
-
-impl<T> From<T> for RequestDeserializationError
 where
     T: Into<DeserializationError>,
 {
     fn from(err: T) -> Self {
-        Self { inner: err.into() }
+        Self::Deserialization(err.into())
     }
 }
 
@@ -132,7 +116,7 @@ where
 #[non_exhaustive]
 pub enum FromHttpResponseError<E> {
     /// Deserialization failed
-    Deserialization(ResponseDeserializationError),
+    Deserialization(DeserializationError),
 
     /// The server returned a non-success status
     Http(ServerError<E>),
@@ -155,7 +139,7 @@ impl<E> From<ServerError<E>> for FromHttpResponseError<E> {
 
 impl<E, T> From<T> for FromHttpResponseError<E>
 where
-    T: Into<ResponseDeserializationError>,
+    T: Into<DeserializationError>,
 {
     fn from(err: T) -> Self {
         Self::Deserialization(err.into())
@@ -164,29 +148,6 @@ where
 
 impl<E: StdError> StdError for FromHttpResponseError<E> {}
 
-/// An error that occurred when trying to deserialize a response.
-#[derive(Debug)]
-pub struct ResponseDeserializationError {
-    inner: DeserializationError,
-}
-
-impl<T> From<T> for ResponseDeserializationError
-where
-    T: Into<DeserializationError>,
-{
-    fn from(err: T) -> Self {
-        Self { inner: err.into() }
-    }
-}
-
-impl fmt::Display for ResponseDeserializationError {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt::Display::fmt(&self.inner, f)
-    }
-}
-
-impl StdError for ResponseDeserializationError {}
-
 /// An error was reported by the server (HTTP status code 4xx or 5xx)
 #[derive(Debug)]
 #[allow(clippy::exhaustive_enums)]
@@ -196,7 +157,7 @@ pub enum ServerError<E> {
     Known(E),
 
     /// An error of unexpected type of structure
-    Unknown(ResponseDeserializationError),
+    Unknown(DeserializationError),
 }
 
 impl<E: fmt::Display> fmt::Display for ServerError<E> {
diff --git a/crates/ruma-api/src/lib.rs b/crates/ruma-api/src/lib.rs
index 85e191c4..211b4141 100644
--- a/crates/ruma-api/src/lib.rs
+++ b/crates/ruma-api/src/lib.rs
@@ -362,7 +362,7 @@ pub trait EndpointError: OutgoingResponse + StdError + Sized + Send + 'static {
     /// the `ruma_api` macro.
     fn try_from_http_response<T: AsRef<[u8]>>(
         response: http::Response<T>,
-    ) -> Result<Self, error::ResponseDeserializationError>;
+    ) -> Result<Self, error::DeserializationError>;
 }
 
 /// Marker trait for requests that don't require authentication, for the client side.
diff --git a/crates/ruma-client-api/src/error.rs b/crates/ruma-client-api/src/error.rs
index bcbfb518..8370f8e7 100644
--- a/crates/ruma-client-api/src/error.rs
+++ b/crates/ruma-client-api/src/error.rs
@@ -4,7 +4,7 @@ use std::{collections::BTreeMap, fmt, time::Duration};
 
 use bytes::BufMut;
 use ruma_api::{
-    error::{IntoHttpError, ResponseDeserializationError},
+    error::{DeserializationError, IntoHttpError},
     EndpointError, OutgoingResponse,
 };
 use ruma_identifiers::RoomVersionId;
@@ -215,7 +215,7 @@ pub struct Error {
 impl EndpointError for Error {
     fn try_from_http_response<T: AsRef<[u8]>>(
         response: http::Response<T>,
-    ) -> Result<Self, ResponseDeserializationError> {
+    ) -> Result<Self, DeserializationError> {
         let status = response.status();
         let error_body: ErrorBody = from_json_slice(response.body().as_ref())?;
         Ok(error_body.into_error(status))
diff --git a/crates/ruma-client-api/src/r0/uiaa.rs b/crates/ruma-client-api/src/r0/uiaa.rs
index 92ce8b3e..f9ce3646 100644
--- a/crates/ruma-client-api/src/r0/uiaa.rs
+++ b/crates/ruma-client-api/src/r0/uiaa.rs
@@ -6,7 +6,7 @@ use std::{borrow::Cow, fmt};
 
 use bytes::BufMut;
 use ruma_api::{
-    error::{IntoHttpError, ResponseDeserializationError},
+    error::{DeserializationError, IntoHttpError},
     EndpointError, OutgoingResponse,
 };
 use ruma_common::thirdparty::Medium;
@@ -827,7 +827,7 @@ impl From<MatrixError> for UiaaResponse {
 impl EndpointError for UiaaResponse {
     fn try_from_http_response<T: AsRef<[u8]>>(
         response: http::Response<T>,
-    ) -> Result<Self, ResponseDeserializationError> {
+    ) -> Result<Self, DeserializationError> {
         if response.status() == http::StatusCode::UNAUTHORIZED {
             Ok(UiaaResponse::AuthResponse(from_json_slice(response.body().as_ref())?))
         } else {