diff --git a/Cargo.lock b/Cargo.lock
index 5a9e2427..6d26c424 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3167,9 +3167,9 @@ dependencies = [
 
 [[package]]
 name = "rlp"
-version = "0.5.1"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "999508abb0ae792aabed2460c45b89106d97fe4adac593bdaef433c2605847b5"
+checksum = "bb919243f34364b6bd2fc10ef797edbfa75f33c252e7998527479c6d6b47e1ec"
 dependencies = [
  "bytes",
  "rustc-hex",
diff --git a/ethers-core/Cargo.toml b/ethers-core/Cargo.toml
index da1eda32..1b94812c 100644
--- a/ethers-core/Cargo.toml
+++ b/ethers-core/Cargo.toml
@@ -13,7 +13,7 @@ keywords = ["ethereum", "web3", "celo", "ethers"]
 [dependencies]
 # Pin FastRLP to 0.1.2 when it was still Apache.
 open-fastrlp = { version = "=0.1.2", features = ["std", "derive", "ethereum-types"] }
-rlp = { version = "0.5.0", default-features = false, features = ["std"] }
+rlp = { version = "0.5.2", default-features = false, features = ["std"] }
 ethabi = { version = "17.2.0", default-features = false, features = ["full-serde", "rlp"] }
 arrayvec = { version = "0.7.2", default-features = false }
 rlp-derive = { version = "0.1.0", default-features = false }