diff --git a/actix-rt/src/arbiter.rs b/actix-rt/src/arbiter.rs
index 48cc752f..ee647aef 100644
--- a/actix-rt/src/arbiter.rs
+++ b/actix-rt/src/arbiter.rs
@@ -16,7 +16,7 @@ use crate::system::{System, SystemCommand};
 pub(crate) static COUNT: AtomicUsize = AtomicUsize::new(0);
 
 thread_local!(
-    static HANDLE: RefCell<Option<ArbiterHandle>> = RefCell::new(None);
+    static HANDLE: RefCell<Option<ArbiterHandle>> = const { RefCell::new(None) };
 );
 
 pub(crate) enum ArbiterCommand {
diff --git a/actix-rt/src/system.rs b/actix-rt/src/system.rs
index 4c276beb..367a2d21 100644
--- a/actix-rt/src/system.rs
+++ b/actix-rt/src/system.rs
@@ -16,7 +16,7 @@ use crate::{arbiter::ArbiterHandle, Arbiter};
 static SYSTEM_COUNT: AtomicUsize = AtomicUsize::new(0);
 
 thread_local!(
-    static CURRENT: RefCell<Option<System>> = RefCell::new(None);
+    static CURRENT: RefCell<Option<System>> = const { RefCell::new(None) };
 );
 
 /// A manager for a per-thread distributed async runtime.
diff --git a/actix-tracing/src/lib.rs b/actix-tracing/src/lib.rs
index b1b9061b..4107b429 100644
--- a/actix-tracing/src/lib.rs
+++ b/actix-tracing/src/lib.rs
@@ -131,7 +131,7 @@ mod test {
     use super::*;
 
     thread_local! {
-        static SPAN: RefCell<Vec<span::Id>> = RefCell::new(Vec::new());
+        static SPAN: RefCell<Vec<span::Id>> = const { RefCell::new(Vec::new()) };
     }
 
     #[derive(Default)]
diff --git a/bytestring/src/lib.rs b/bytestring/src/lib.rs
index 80ab085e..6cb164dc 100644
--- a/bytestring/src/lib.rs
+++ b/bytestring/src/lib.rs
@@ -13,7 +13,7 @@ use alloc::{
     string::{String, ToString},
     vec::Vec,
 };
-use core::{borrow::Borrow, convert::TryFrom, fmt, hash, ops, str};
+use core::{borrow::Borrow, fmt, hash, ops, str};
 
 use bytes::Bytes;