diff --git a/tower/Cargo.toml b/tower/Cargo.toml
index 9ed88177b..18fc694d0 100644
--- a/tower/Cargo.toml
+++ b/tower/Cargo.toml
@@ -74,9 +74,9 @@ hdrhistogram = { version = "7.0", optional = true }
 indexmap = { version = "1.0.2", optional = true }
 rand = { version = "0.8", features = ["small_rng"], optional = true }
 slab = { version = "0.4", optional = true }
-tokio = { version = "1", optional = true, features = ["sync"] }
+tokio = { version = "1.6", optional = true, features = ["sync"] }
 tokio-stream = { version = "0.1.0", optional = true }
-tokio-util = { version = "0.6.3", default-features = false, optional = true }
+tokio-util = { version = "0.7.0", default-features = false, optional = true }
 tracing = { version = "0.1.2", default-features = false, features = ["std"], optional = true }
 pin-project = { version = "1", optional = true }
 pin-project-lite = { version = "0.2.7", optional = true }
@@ -85,7 +85,7 @@ pin-project-lite = { version = "0.2.7", optional = true }
 futures = "0.3"
 hdrhistogram = "7.0"
 pin-project-lite = "0.2.7"
-tokio = { version = "1", features = ["macros", "sync", "test-util", "rt-multi-thread"] }
+tokio = { version = "1.6", features = ["macros", "sync", "test-util", "rt-multi-thread"] }
 tokio-stream = "0.1"
 tokio-test = "0.4"
 tower-test = { version = "0.4", path = "../tower-test" }