diff --git a/src/web.rs b/src/web.rs
index 02d16d2..d2283bb 100644
--- a/src/web.rs
+++ b/src/web.rs
@@ -33,7 +33,7 @@ async fn auth_setup(
     /* host: String, forwarded_proto: Option<String>, */ state: State,
 ) -> Result<impl warp::Reply, warp::Rejection> {
     // let final_redirect_uri = format!("{}://{}/auth_done", forwarded_proto.as_deref().unwrap_or("http"), host);
-    let final_redirect_uri = std::env::var("MONZO_REDIRECT_URI").unwrap();
+    let final_redirect_uri = format!("{}/auth_done", state.config.base_uri);
     let mut url = Url::parse("https://auth.monzo.com/").unwrap();
     url.query_pairs_mut()
         .append_pair("client_id", &state.config.monzo_client_id)