diff --git a/codex-rs/Cargo.lock b/codex-rs/Cargo.lock
index 29be64f9a9..2e6febf9d2 100644
--- a/codex-rs/Cargo.lock
+++ b/codex-rs/Cargo.lock
@@ -1019,6 +1019,7 @@ dependencies = [
  "shlex",
  "tempfile",
  "tokio",
+ "tokio-util",
  "toml 0.9.5",
  "tracing",
  "tracing-subscriber",
diff --git a/codex-rs/app-server/Cargo.toml b/codex-rs/app-server/Cargo.toml
index fbe9150a1a..2e472ec93f 100644
--- a/codex-rs/app-server/Cargo.toml
+++ b/codex-rs/app-server/Cargo.toml
@@ -42,6 +42,7 @@ tokio = { workspace = true, features = [
     "rt-multi-thread",
     "signal",
 ] }
+tokio-util = { workspace = true }
 tracing = { workspace = true, features = ["log"] }
 tracing-subscriber = { workspace = true, features = ["env-filter", "fmt"] }
 uuid = { workspace = true, features = ["serde", "v7"] }