r2d2_diesel is included in diesel since 1.1, so we don't need the dependencies directly.

Same thing with time, included in chrono

src/db/mod.rs

@@ -2,8 +2,8 @@ use std::ops::Deref;
 
 use diesel::{Connection as DieselConnection, ConnectionError};
 use diesel::sqlite::SqliteConnection;
-use r2d2;
-use r2d2_diesel::ConnectionManager;
+use diesel::r2d2;
+use diesel::r2d2::ConnectionManager;
 
 use rocket::http::Status;
 use rocket::request::{self, FromRequest};