diff --git a/matrix_sdk_appservice/Cargo.toml b/matrix_sdk_appservice/Cargo.toml
index 5230ff1e..59e34327 100644
--- a/matrix_sdk_appservice/Cargo.toml
+++ b/matrix_sdk_appservice/Cargo.toml
@@ -21,6 +21,7 @@ futures = "0.3"
 futures-util = "0.3"
 http = "0.2"
 regex = "1"
+serde = "1.0.126"
 serde_yaml = "0.8"
 thiserror = "1.0"
 tracing = "0.1"
@@ -28,6 +29,10 @@ url = "2"
 
 matrix-sdk = { version = "0.2", path = "../matrix_sdk", default-features = false, features = ["appservice", "native-tls"] }
 
+[dependencies.ruma]
+version = "0.1.2"
+features = ["client-api-c", "appservice-api-s", "unstable-pre-spec"]
+
 [dev-dependencies]
 env_logger = "0.8"
 mockito = "0.30"
diff --git a/matrix_sdk_appservice/src/actix.rs b/matrix_sdk_appservice/src/actix.rs
index 672f417a..7ee09183 100644
--- a/matrix_sdk_appservice/src/actix.rs
+++ b/matrix_sdk_appservice/src/actix.rs
@@ -29,7 +29,7 @@ use actix_web::{
 };
 use futures::Future;
 use futures_util::{TryFutureExt, TryStreamExt};
-use matrix_sdk::api_appservice as api;
+use ruma::api::appservice as api;
 
 use crate::{error::Error, Appservice};
 
@@ -102,7 +102,7 @@ pub struct IncomingRequest<T> {
     incoming: T,
 }
 
-impl<T: matrix_sdk::IncomingRequest> FromRequest for IncomingRequest<T> {
+impl<T: ruma::api::IncomingRequest> FromRequest for IncomingRequest<T> {
     type Error = Error;
     type Future = Pin<Box<dyn Future<Output = Result<Self, Self::Error>>>>;
     type Config = ();
@@ -145,7 +145,7 @@ impl<T: matrix_sdk::IncomingRequest> FromRequest for IncomingRequest<T> {
 
             let access_token = match request.uri().query() {
                 Some(query) => {
-                    let query: Vec<(String, String)> = matrix_sdk::urlencoded::from_str(query)?;
+                    let query: Vec<(String, String)> = ruma::serde::urlencoded::from_str(query)?;
                     query.into_iter().find(|(key, _)| key == "access_token").map(|(_, value)| value)
                 }
                 None => None,
@@ -160,7 +160,7 @@ impl<T: matrix_sdk::IncomingRequest> FromRequest for IncomingRequest<T> {
 
             Ok(IncomingRequest {
                 access_token,
-                incoming: matrix_sdk::IncomingRequest::try_from_http_request(request)?,
+                incoming: ruma::api::IncomingRequest::try_from_http_request(request)?,
             })
         })
     }
diff --git a/matrix_sdk_appservice/src/error.rs b/matrix_sdk_appservice/src/error.rs
index c42b3370..3b59bef0 100644
--- a/matrix_sdk_appservice/src/error.rs
+++ b/matrix_sdk_appservice/src/error.rs
@@ -32,10 +32,10 @@ pub enum Error {
     NoClientForLocalpart,
 
     #[error(transparent)]
-    HttpRequest(#[from] matrix_sdk::FromHttpRequestError),
+    HttpRequest(#[from] ruma::api::error::FromHttpRequestError),
 
     #[error(transparent)]
-    Identifier(#[from] matrix_sdk::identifiers::Error),
+    Identifier(#[from] ruma::identifiers::Error),
 
     #[error(transparent)]
     Http(#[from] http::Error),
@@ -44,7 +44,7 @@ pub enum Error {
     Url(#[from] url::ParseError),
 
     #[error(transparent)]
-    Serde(#[from] matrix_sdk::SerdeError),
+    Serde(#[from] serde::de::value::Error),
 
     #[error(transparent)]
     Io(#[from] std::io::Error),
diff --git a/matrix_sdk_appservice/src/lib.rs b/matrix_sdk_appservice/src/lib.rs
index 7aab474b..2b27fb57 100644
--- a/matrix_sdk_appservice/src/lib.rs
+++ b/matrix_sdk_appservice/src/lib.rs
@@ -87,23 +87,24 @@ use std::{
 
 use dashmap::DashMap;
 use http::Uri;
-#[doc(inline)]
-pub use matrix_sdk::api_appservice as api;
-use matrix_sdk::{
-    api::{
-        error::ErrorKind,
-        r0::{
-            account::register::{LoginType, Request as RegistrationRequest},
-            uiaa::UiaaResponse,
-        },
-    },
-    api_appservice::Registration,
-    assign,
-    identifiers::{self, DeviceId, ServerNameBox, UserId},
-    reqwest::Url,
-    Client, ClientConfig, EventHandler, FromHttpResponseError, HttpError, ServerError, Session,
-};
+use matrix_sdk::{reqwest::Url, Client, ClientConfig, EventHandler, HttpError, Session};
 use regex::Regex;
+#[doc(inline)]
+pub use ruma::api::appservice as api;
+use ruma::{
+    api::{
+        appservice::Registration,
+        client::{
+            error::ErrorKind,
+            r0::{
+                account::register::{LoginType, Request as RegistrationRequest},
+                uiaa::UiaaResponse,
+            },
+        },
+        error::{FromHttpResponseError, ServerError},
+    },
+    assign, identifiers, DeviceId, ServerNameBox, UserId,
+};
 use tracing::warn;
 
 #[cfg(feature = "actix")]