diff --git a/Cargo.lock b/Cargo.lock
index f04d4ec..3d1bbb8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1072,9 +1072,9 @@ dependencies = [
 
 [[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 1.2.1",
@@ -1082,7 +1082,6 @@ dependencies = [
  "memchr",
  "mio",
  "num_cpus",
- "once_cell",
  "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",