diff --git a/src/upload.rs b/src/upload.rs
index 4b2e912..ba14219 100644
--- a/src/upload.rs
+++ b/src/upload.rs
@@ -7,7 +7,7 @@ use actix_files::NamedFile;
 use actix_multipart::Multipart;
 use actix_web::http::header::LOCATION;
 use actix_web::{error, web, Error, HttpRequest, HttpResponse};
-use rand::prelude::SliceRandom;
+use rand::{distributions::Slice, Rng};
 use sqlx::postgres::PgPool;
 use std::path::PathBuf;
 use tokio::fs::{self, OpenOptions};
@@ -139,12 +139,11 @@ async fn create_unique_file(
 }
 
 fn gen_file_id() -> String {
-    let mut rng = rand::thread_rng();
-    let mut id = String::with_capacity(5);
-    for _ in 0..5 {
-        id.push(*ID_CHARS.choose(&mut rng).expect("ID_CHARS is not empty"));
-    }
-    id
+    let distribution = Slice::new(ID_CHARS).expect("ID_CHARS is not empty");
+    rand::thread_rng()
+        .sample_iter(distribution)
+        .take(5)
+        .collect()
 }
 
 fn get_file_url(req: &HttpRequest, id: &str, name: Option<&str>) -> String {