diff --git a/stress-test/Cargo.toml b/stress-test/Cargo.toml
index 769dc485..e1425619 100644
--- a/stress-test/Cargo.toml
+++ b/stress-test/Cargo.toml
@@ -11,4 +11,4 @@ publish = false
 tokio = { path = "../tokio/", features = ["full"] }
 
 [dev-dependencies]
-rand = "0.7.3"
+rand = "0.8"
diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml
index 2750a6d3..ca0f41ea 100644
--- a/tokio/Cargo.toml
+++ b/tokio/Cargo.toml
@@ -127,7 +127,7 @@ tempfile = "3.1.0"
 async-stream = "0.3"
 
 [target.'cfg(loom)'.dev-dependencies]
-loom = { version = "0.3.5", features = ["futures", "checkpoint"] }
+loom = { version = "0.4", features = ["futures", "checkpoint"] }
 
 [build-dependencies]
 autocfg = "1" # Needed for conditionally enabling `track-caller`