diff --git a/chat-app/Cargo.lock b/chat-app/Cargo.lock
index 8e3e835..4dc19a5 100644
--- a/chat-app/Cargo.lock
+++ b/chat-app/Cargo.lock
@@ -1089,16 +1089,15 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.18.0"
+version = "1.18.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f48b6d60512a392e34dbf7fd456249fd2de3c83669ab642e021903f4015185b"
+checksum = "8bfb875c82dc0a4f1f37a30e720dee181a2b3a06a428b0fc6873ea38d6407850"
 dependencies = [
  "bytes",
  "libc",
  "memchr",
  "mio",
  "num_cpus",
- "once_cell",
  "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",