diff --git a/src/bastion/Cargo.toml b/src/bastion/Cargo.toml
index 582c2856..1d536855 100644
--- a/src/bastion/Cargo.toml
+++ b/src/bastion/Cargo.toml
@@ -16,6 +16,7 @@ documentation = "https://docs.rs/bastion"
 readme = "../../README.md"
 license = "Apache-2.0/MIT"
 edition = "2018"
+rust-version = "1.63"
 exclude = [
 	".github/*",
 	"examples/*",
@@ -64,7 +65,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 pin-utils = "0.1"
 
-async-mutex = "1.1"
+async-lock = "3.4"
 uuid = { version = "0.8", features = ["v4"] }
 
 # Distributed
diff --git a/src/bastion/src/system.rs b/src/bastion/src/system.rs
index 9ff74f15..1c8272ce 100644
--- a/src/bastion/src/system.rs
+++ b/src/bastion/src/system.rs
@@ -6,7 +6,7 @@ use crate::envelope::Envelope;
 use crate::message::{BastionMessage, Deployment};
 use crate::path::{BastionPath, BastionPathElement};
 use crate::supervisor::{Supervisor, SupervisorRef};
-use async_mutex::Mutex as AsyncMutex;
+use async_lock::Mutex as AsyncMutex;
 use bastion_executor::pool;
 use futures::prelude::*;
 use futures::stream::FuturesUnordered;