diff --git a/proxmox-rest-server/examples/minimal-rest-server.rs b/proxmox-rest-server/examples/minimal-rest-server.rs
index 22477039..8954ce76 100644
--- a/proxmox-rest-server/examples/minimal-rest-server.rs
+++ b/proxmox-rest-server/examples/minimal-rest-server.rs
@@ -1,5 +1,7 @@
 use std::sync::{Arc, Mutex};
 use std::collections::HashMap;
+use std::future::Future;
+use std::pin::Pin;
 
 use anyhow::{bail, format_err, Error};
 use lazy_static::lazy_static;
@@ -26,15 +28,17 @@ impl UserInformation for DummyUserInfo {
 struct DummyAuth;
 
 impl ApiAuth for DummyAuth {
-    fn check_auth(
-        &self,
-        _headers: &http::HeaderMap,
-        _method: &hyper::Method,
-    ) -> Result<(String, Box<dyn UserInformation + Sync + Send>), AuthError> {
-        // get some global/cached userinfo
-        let userinfo = DummyUserInfo;
-        // Do some user checks, e.g. cookie/csrf
-        Ok(("User".to_string(), Box::new(userinfo)))
+    fn check_auth<'a>(
+        &'a self,
+        _headers: &'a http::HeaderMap,
+        _method: &'a hyper::Method,
+    ) -> Pin<Box<dyn Future<Output = Result<(String, Box<dyn UserInformation + Sync + Send>), AuthError>> + Send + 'a>> {
+        Box::pin(async move {
+            // get some global/cached userinfo
+            let userinfo: Box<dyn UserInformation + Sync + Send> = Box::new(DummyUserInfo);
+            // Do some user checks, e.g. cookie/csrf
+            Ok(("User".to_string(), userinfo))
+        })
     }
 }
 
diff --git a/proxmox-rest-server/src/lib.rs b/proxmox-rest-server/src/lib.rs
index fe392775..bb29295c 100644
--- a/proxmox-rest-server/src/lib.rs
+++ b/proxmox-rest-server/src/lib.rs
@@ -16,6 +16,8 @@
 //! * generic interface to authenticate user
 
 use std::sync::atomic::{Ordering, AtomicBool};
+use std::future::Future;
+use std::pin::Pin;
 
 use anyhow::{bail, format_err, Error};
 use nix::unistd::Pid;
@@ -74,11 +76,11 @@ pub trait ApiAuth {
     ///
     /// If credenthials are valid, returns the username and a
     /// [UserInformation] object to query additional user data.
-    fn check_auth(
-        &self,
-        headers: &http::HeaderMap,
-        method: &hyper::Method,
-    ) -> Result<(String, Box<dyn UserInformation + Sync + Send>), AuthError>;
+    fn check_auth<'a>(
+        &'a self,
+        headers: &'a http::HeaderMap,
+        method: &'a hyper::Method,
+    ) -> Pin<Box<dyn Future<Output = Result<(String, Box<dyn UserInformation + Sync + Send>), AuthError>> + Send + 'a>>;
 }
 
 lazy_static::lazy_static!{
diff --git a/proxmox-rest-server/src/rest.rs b/proxmox-rest-server/src/rest.rs
index e65e5d6b..80ab0461 100644
--- a/proxmox-rest-server/src/rest.rs
+++ b/proxmox-rest-server/src/rest.rs
@@ -654,7 +654,7 @@ async fn handle_request(
             let mut user_info: Box<dyn UserInformation + Send + Sync> = Box::new(EmptyUserInformation {});
 
             if auth_required {
-                match auth.check_auth(&parts.headers, &method) {
+                match auth.check_auth(&parts.headers, &method).await {
                     Ok((authid, info)) => {
                         rpcenv.set_auth_id(Some(authid));
                         user_info = info;
@@ -726,7 +726,7 @@ async fn handle_request(
 
         if comp_len == 0 {
             let language = extract_lang_header(&parts.headers);
-            match auth.check_auth(&parts.headers, &method) {
+            match auth.check_auth(&parts.headers, &method).await {
                 Ok((auth_id, _user_info)) => {
                     return Ok(api.get_index(Some(auth_id), language, parts));
                 }