diff --git a/Cargo.lock b/Cargo.lock
index 6932cc5..6def150 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1128,7 +1128,6 @@ dependencies = [
  "parking_lot",
  "pin-utils",
  "rand",
- "slab",
  "tracing",
  "tracing-subscriber",
 ]
diff --git a/runtime/executor/Cargo.toml b/runtime/executor/Cargo.toml
index 85c6df6..be7e348 100644
--- a/runtime/executor/Cargo.toml
+++ b/runtime/executor/Cargo.toml
@@ -39,7 +39,6 @@ lazy_static = "1.4"
 libc = "0.2"
 num_cpus = "1.13"
 pin-utils = "0.1.0"
-slab = "0.4"
 parking_lot = "0.12"
 
 # Allocator
diff --git a/runtime/executor/src/lib.rs b/runtime/executor/src/lib.rs
index c3d71fa..96024ea 100644
--- a/runtime/executor/src/lib.rs
+++ b/runtime/executor/src/lib.rs
@@ -32,6 +32,7 @@ pub mod manage;
 pub mod placement;
 pub mod pool;
 pub mod run;
+mod supervision;
 mod thread_manager;
 mod worker;
 
diff --git a/runtime/executor/src/supervision.rs b/runtime/executor/src/supervision.rs
new file mode 100644
index 0000000..9694c84
--- /dev/null
+++ b/runtime/executor/src/supervision.rs
@@ -0,0 +1,3 @@
+pub(crate) struct SupervisionRegistry {}
+
+impl SupervisionRegistry {}