diff --git a/cumulus/Cargo.lock b/cumulus/Cargo.lock
index 585a016eba..9e779d560f 100644
--- a/cumulus/Cargo.lock
+++ b/cumulus/Cargo.lock
@@ -957,9 +957,9 @@ checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
 [[package]]
 name = "bytes"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dfb24e866b15a1af2a1b663f10c6b6b8f397a84aadb828f12e5b289ec23a3a3c"
+checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
 
 [[package]]
 name = "bzip2-sys"
diff --git a/cumulus/pallets/parachain-system/Cargo.toml b/cumulus/pallets/parachain-system/Cargo.toml
index abd333470e..a1018cf65b 100644
--- a/cumulus/pallets/parachain-system/Cargo.toml
+++ b/cumulus/pallets/parachain-system/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 description = "Base pallet for cumulus-based parachains"
 
 [dependencies]
-bytes = { version = "1.3.0", default-features = false }
+bytes = { version = "1.4.0", default-features = false }
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive"] }
 environmental = { version = "1.1.4", default-features = false }
 impl-trait-for-tuples = "0.2.1"