diff --git a/Cargo.lock b/Cargo.lock
index 1c97769..ded058c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3134,9 +3134,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.20.1"
+version = "1.20.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a8325f63a7d4774dd041e363b2409ed1c5cbbd0f867795e661df066b2b0a581"
+checksum = "eb78f30e4b41e98ca4cce5acb51168a033839a7af9e42b380355808e14e98ee0"
 dependencies = [
  "autocfg",
  "bytes",
@@ -3144,7 +3144,6 @@ dependencies = [
  "memchr",
  "mio",
  "num_cpus",
- "once_cell",
  "parking_lot 0.12.1",
  "pin-project-lite",
  "signal-hook-registry",
diff --git a/Cargo.toml b/Cargo.toml
index d9180af..f096dea 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,4 +17,4 @@ ethers = { git = "https://github.com/gakonst/ethers-rs", features=["abigen", "so
 rand = "0.8.5"
 sha2 = "0.10.2"
 tiny-keccak = { version = "2.0.2", features = ["keccak"]}
-tokio = { version = "1.20.1", features = ["macros", "rt"] }
\ No newline at end of file
+tokio = { version = "1.20.4", features = ["macros", "rt"] }
\ No newline at end of file