diff --git a/server/src/main.rs b/server/src/main.rs
index 363604e..899e34e 100644
--- a/server/src/main.rs
+++ b/server/src/main.rs
@@ -3,7 +3,11 @@ extern crate rocket;
 
 use std::{error::Error, process::Command, str::FromStr};
 
-use rocket::{response::Debug, serde::json::Json, State};
+use rocket::{
+    response::{content::Plain, Debug},
+    serde::json::Json,
+    State,
+};
 use rocket_cors::{AllowedHeaders, AllowedOrigins};
 
 use notmuch::{MessageId, Notmuch, NotmuchError, SearchSummary, ThreadSet};
@@ -29,14 +33,14 @@ async fn show(nm: &State<Notmuch>, query: &str) -> Result<Json<ThreadSet>, Debug
 }
 
 #[get("/original/<id>")]
-async fn original(nm: &State<Notmuch>, id: &str) -> Result<Vec<u8>, Debug<NotmuchError>> {
+async fn original(nm: &State<Notmuch>, id: &str) -> Result<Plain<Vec<u8>>, Debug<NotmuchError>> {
     let mid = if id.starts_with("id:") {
         id.to_string()
     } else {
         format!("id:{}", id)
     };
     let res = nm.show_original(&mid)?;
-    Ok(res)
+    Ok(Plain(res))
 }
 
 #[rocket::main]