diff --git a/aws/rust-runtime/aws-config/Cargo.toml b/aws/rust-runtime/aws-config/Cargo.toml
index 2a43647379..87fb754a01 100644
--- a/aws/rust-runtime/aws-config/Cargo.toml
+++ b/aws/rust-runtime/aws-config/Cargo.toml
@@ -30,7 +30,7 @@ aws-smithy-types = { path = "../../sdk/build/aws-sdk/sdk/aws-smithy-types" }
 aws-types = { path = "../../sdk/build/aws-sdk/sdk/aws-types" }
 hyper = { version = "0.14.12", default-features = false }
 time = { version = "0.3.4", features = ["parsing"] }
-tokio = { version = "1.8.4", features = ["sync"] }
+tokio = { version = "1.13.1", features = ["sync"] }
 tracing = { version = "0.1" }
 
 # implementation detail of SSO credential caching
diff --git a/rust-runtime/aws-smithy-client/Cargo.toml b/rust-runtime/aws-smithy-client/Cargo.toml
index 046447d608..79e07ec9af 100644
--- a/rust-runtime/aws-smithy-client/Cargo.toml
+++ b/rust-runtime/aws-smithy-client/Cargo.toml
@@ -9,7 +9,7 @@ repository = "https://github.com/awslabs/smithy-rs"
 
 [features]
 rt-tokio = ["aws-smithy-async/rt-tokio"]
-test-util = ["aws-smithy-protocol-test", "serde/derive", "rustls", "hyper/server", "hyper/h2"]
+test-util = ["aws-smithy-protocol-test", "serde/derive", "rustls", "hyper/server", "hyper/h2", "tokio/full"]
 native-tls = ["client-hyper", "hyper-tls", "rt-tokio"]
 rustls = ["client-hyper", "hyper-rustls", "rt-tokio", "lazy_static"]
 client-hyper = ["hyper"]
@@ -35,7 +35,7 @@ hyper-tls = { version = "0.5.0", optional = true }
 lazy_static = { version = "1", optional = true }
 pin-project-lite = "0.2.7"
 serde = { version = "1", features = ["derive"], optional = true }
-tokio = { version = "1.8.4" }
+tokio = { version = "1.13.1", optional = true }
 tower = { version = "0.4.6", features = ["util", "retry"] }
 tracing = "0.1"