diff --git a/Cargo.lock b/Cargo.lock
index e46cc6a..653e1e6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3992,9 +3992,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.39.3"
+version = "1.40.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9babc99b9923bfa4804bd74722ff02c0381021eafa4db9949217e3be8e84fff5"
+checksum = "e2b070231665d27ad9ec9b8df639893f46727666c6767db40317fbe920a5d998"
 dependencies = [
  "backtrace",
  "bytes",
diff --git a/Cargo.toml b/Cargo.toml
index d88ad09..44c58c9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ pretty_assertions = "1.4.0"
 env_logger = "0.10.2"
 serde = "1.0.209"
 serde_repr = "0.1.19"
-tokio = { version = "1.39.3", features = ["fs", "rt", "macros"] }
+tokio = { version = "1.40.0", features = ["fs", "rt", "macros"] }
 
 # workspace-local
 zinnia_runtime = { version = "0.20.2", path = "./runtime" }