diff --git a/cumulus/Cargo.lock b/cumulus/Cargo.lock
index f8b081cf72..b21e5bf1cb 100644
--- a/cumulus/Cargo.lock
+++ b/cumulus/Cargo.lock
@@ -737,9 +737,9 @@ checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
 [[package]]
 name = "bytes"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0b3de4a0c5e67e16066a0715723abd91edc2f9001d09c46e1dca929351e130e"
+checksum = "ec8a7b6a70fde80372154c65702f00a0f56f3e1c36abbc6c440484be248856db"
 
 [[package]]
 name = "bzip2-sys"
diff --git a/cumulus/pallets/parachain-system/Cargo.toml b/cumulus/pallets/parachain-system/Cargo.toml
index e115eb88b3..df99164044 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 = "1.2.0", default-features = false }
+bytes = { version = "1.2.1", default-features = false }
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive"] }
 environmental = { version = "1.1.2", default-features = false }
 impl-trait-for-tuples = "0.2.1"