diff --git a/config/src/prelude.rs b/config/src/prelude.rs
index aa9a20b65..c000154db 100644
--- a/config/src/prelude.rs
+++ b/config/src/prelude.rs
@@ -2,7 +2,6 @@
 // https://doc.rust-lang.org/src/alloc/prelude/v1.rs.html
 pub use alloc::{
     borrow::ToOwned,
-    boxed::Box,
     format,
     string::{String, ToString},
     vec,
diff --git a/light-client-verifier/src/prelude.rs b/light-client-verifier/src/prelude.rs
index 57a0cedc3..b449374ca 100644
--- a/light-client-verifier/src/prelude.rs
+++ b/light-client-verifier/src/prelude.rs
@@ -1,13 +1,10 @@
 // Re-export according to alloc::prelude::v1 because it is not yet stabilized
 // https://doc.rust-lang.org/src/alloc/prelude/v1.rs.html
+#[allow(unused_imports)]
 pub use alloc::{
-    borrow::ToOwned,
     boxed::Box,
-    format,
     string::{String, ToString},
     vec,
     vec::Vec,
 };
-// will be included in 2021 edition.
-pub use core::convert::{TryFrom, TryInto};
 pub use core::prelude::v1::*;
diff --git a/proto/src/prelude.rs b/proto/src/prelude.rs
index aa9a20b65..6d57c28e6 100644
--- a/proto/src/prelude.rs
+++ b/proto/src/prelude.rs
@@ -2,10 +2,8 @@
 // https://doc.rust-lang.org/src/alloc/prelude/v1.rs.html
 pub use alloc::{
     borrow::ToOwned,
-    boxed::Box,
     format,
     string::{String, ToString},
-    vec,
     vec::Vec,
 };
 pub use core::prelude::v1::*;