diff --git a/tokio-executor/Cargo.toml b/tokio-executor/Cargo.toml
index 465bae8d6f3..2d8a7161b1d 100644
--- a/tokio-executor/Cargo.toml
+++ b/tokio-executor/Cargo.toml
@@ -21,7 +21,7 @@ keywords = ["futures", "tokio"]
 categories = ["concurrency", "asynchronous"]
 
 [dependencies]
-crossbeam-utils = "0.6.2"
+crossbeam-utils = "0.7.0"
 futures = "0.1.19"
 
 [dev-dependencies]
diff --git a/tokio-reactor/Cargo.toml b/tokio-reactor/Cargo.toml
index 028493ed14b..6d2faebd53e 100644
--- a/tokio-reactor/Cargo.toml
+++ b/tokio-reactor/Cargo.toml
@@ -21,7 +21,7 @@ Event loop that drives Tokio I/O resources.
 categories = ["asynchronous", "network-programming"]
 
 [dependencies]
-crossbeam-utils = "0.6.0"
+crossbeam-utils = "0.7.0"
 futures = "0.1.19"
 lazy_static = "1.0.2"
 log = "0.4.1"
diff --git a/tokio-threadpool/Cargo.toml b/tokio-threadpool/Cargo.toml
index 38f7e4097e4..5db03aec480 100644
--- a/tokio-threadpool/Cargo.toml
+++ b/tokio-threadpool/Cargo.toml
@@ -24,8 +24,8 @@ categories = ["concurrency", "asynchronous"]
 tokio-executor = "0.1.8"
 futures = "0.1.19"
 crossbeam-deque = "0.7.0"
-crossbeam-queue = "0.1.0"
-crossbeam-utils = "0.6.4"
+crossbeam-queue = "0.2.0"
+crossbeam-utils = "0.7.0"
 num_cpus = "1.2"
 slab = "0.4.1"
 log = "0.4"
diff --git a/tokio-threadpool/tests/threadpool.rs b/tokio-threadpool/tests/threadpool.rs
index bd6736f9aaa..06c007444a7 100644
--- a/tokio-threadpool/tests/threadpool.rs
+++ b/tokio-threadpool/tests/threadpool.rs
@@ -131,7 +131,7 @@ fn force_shutdown_drops_futures() {
                 b.fetch_add(1, Relaxed);
             })
             .build();
-        let mut tx = pool.sender().clone();
+        let tx = pool.sender().clone();
 
         tx.spawn(Never(num_drop.clone())).unwrap();
 
@@ -190,7 +190,7 @@ fn drop_threadpool_drops_futures() {
                 b.fetch_add(1, Relaxed);
             })
             .build();
-        let mut tx = pool.sender().clone();
+        let tx = pool.sender().clone();
 
         tx.spawn(Never(num_drop.clone())).unwrap();
 
@@ -219,7 +219,7 @@ fn many_oneshot_futures() {
 
     for _ in 0..50 {
         let pool = ThreadPool::new();
-        let mut tx = pool.sender().clone();
+        let tx = pool.sender().clone();
         let cnt = Arc::new(AtomicUsize::new(0));
 
         for _ in 0..NUM {
@@ -251,7 +251,7 @@ fn many_multishot_futures() {
 
     for _ in 0..50 {
         let pool = ThreadPool::new();
-        let mut pool_tx = pool.sender().clone();
+        let pool_tx = pool.sender().clone();
 
         let mut start_txs = Vec::with_capacity(TRACKS);
         let mut final_rxs = Vec::with_capacity(TRACKS);
diff --git a/tokio-timer/Cargo.toml b/tokio-timer/Cargo.toml
index 6330299b112..2c5e929eec1 100644
--- a/tokio-timer/Cargo.toml
+++ b/tokio-timer/Cargo.toml
@@ -22,7 +22,7 @@ Timer facilities for Tokio
 [dependencies]
 futures = "0.1.19"
 tokio-executor = "0.1.1"
-crossbeam-utils = "0.6.0"
+crossbeam-utils = "0.7.0"
 
 # Backs `DelayQueue`
 slab = "0.4.1"
diff --git a/tokio-timer/tests/queue.rs b/tokio-timer/tests/queue.rs
index eeba610414b..613b6c6ddda 100644
--- a/tokio-timer/tests/queue.rs
+++ b/tokio-timer/tests/queue.rs
@@ -390,7 +390,7 @@ fn reset_first_expiring_item_to_expire_later() {
         let epoch = time.now();
 
         let foo = queue.insert_at("foo", epoch + ms(200));
-        let bar = queue.insert_at("bar", epoch + ms(250));
+        let _bar = queue.insert_at("bar", epoch + ms(250));
 
         task.enter(|| {
             assert_not_ready!(queue);