diff --git a/Cargo.toml b/Cargo.toml
index 961b1d8..2fee6a0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -47,7 +47,7 @@ arbitrary = { version = "1", optional = true, default-features = false }
 ark-ff-03 = { version = "0.3.0", package = "ark-ff", optional = true, default-features = false }
 ark-ff-04 = { version = "0.4.0", package = "ark-ff", optional = true, default-features = false }
 bn-rs = { version = "0.2", optional = true, default-features = true }
-fastrlp = { version = "0.3", optional = true, default-features = false, features = ["alloc"] }
+fastrlp = { version = "0.4", optional = true, default-features = false, features = ["alloc"] }
 num-bigint = { version = "0.4", optional = true, default-features = false }
 num-integer = { version = "0.1", optional = true, default-features = false }
 num-traits = { version = "0.2.16", optional = true, default-features = false }