diff --git a/complete_blockchain/Cargo.lock b/complete_blockchain/Cargo.lock
index 699a6ae..ab6e150 100644
--- a/complete_blockchain/Cargo.lock
+++ b/complete_blockchain/Cargo.lock
@@ -156,13 +156,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.5"
+version = "0.8.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d82cfc11ce7f2c3faef78d8a684447b40d503d9681acebed6cb728d45940c4db"
-dependencies = [
- "cfg-if",
- "lazy_static",
-]
+checksum = "248e3bacc7dc6baa3b21e405ee045c3047101a49145e7e9eca583ab4c2ca5345"
 
 [[package]]
 name = "data-encoding"