diff --git a/Cargo.toml b/Cargo.toml
index 94974a1..c24bd10 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,2 +1,3 @@
 [workspace]
 members = ["asynchronix"]
+resolver = "2"
diff --git a/asynchronix/src/util/priority_queue.rs b/asynchronix/src/util/priority_queue.rs
index b57dca1..293211f 100644
--- a/asynchronix/src/util/priority_queue.rs
+++ b/asynchronix/src/util/priority_queue.rs
@@ -1,6 +1,6 @@
 //! Associative priority queue.
 
-use std::cmp::{Eq, Ord, Ordering, PartialOrd};
+use std::cmp::Ordering;
 use std::collections::BinaryHeap;
 
 /// A key-value pair ordered by keys in inverse order, with epoch-based ordering