diff --git a/Cargo.lock b/Cargo.lock
index a5f4583519..4b32cbe31a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -9590,8 +9590,8 @@ dependencies = [
  "serde",
  "serde_json",
  "sha2 0.10.9",
- "sp-ark-bls12-381",
  "sp-core",
+ "sp-crypto-ec-utils",
  "sp-io",
  "sp-keyring",
  "sp-keystore",
@@ -16801,15 +16801,6 @@ dependencies = [
  "static_assertions",
 ]
 
-[[package]]
-name = "sp-ark-bls12-381"
-version = "0.4.2"
-source = "git+https://github.com/paritytech/arkworks-substrate#f08093a5f7c32778eae1295430ec064dccd062a6"
-dependencies = [
- "ark-bls12-381-ext",
- "sp-crypto-ec-utils",
-]
-
 [[package]]
 name = "sp-authority-discovery"
 version = "37.0.0"
diff --git a/Cargo.toml b/Cargo.toml
index 05cea1d929..1d65a3cd5e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -274,7 +274,6 @@ sp-keystore = { git = "https://github.com/paritytech/polkadot-sdk.git", tag = "p
 w3f-bls = { git = "https://github.com/opentensor/bls", branch = "fix-no-std", default-features = false }
 ark-crypto-primitives = { version = "0.4.0", default-features = false }
 ark-scale = { version = "0.0.11", default-features = false }
-sp-ark-bls12-381 = { git = "https://github.com/paritytech/arkworks-substrate", package = "sp-ark-bls12-381", default-features = false }
 ark-bls12-381 = { version = "0.4.0", default-features = false }
 ark-serialize = { version = "0.4.0", default-features = false }
 ark-ff = { version = "0.4.0", default-features = false }
diff --git a/pallets/drand/Cargo.toml b/pallets/drand/Cargo.toml
index 269e993d02..6e3ad982f7 100644
--- a/pallets/drand/Cargo.toml
+++ b/pallets/drand/Cargo.toml
@@ -17,7 +17,7 @@ scale-info = { workspace = true, features = ["derive"] }
 serde = { workspace = true, features = ["derive"] }
 serde_json.workspace = true
 log.workspace = true
-hex = { workspace = true, features = ["serde"] }
+hex = { workspace = true, features = ["serde", "alloc"] }
 sha2.workspace = true
 anyhow.workspace = true
 # frame deps
@@ -29,7 +29,7 @@ sp-io.workspace = true
 sp-runtime.workspace = true
 sp-std.workspace = true
 # arkworks dependencies
-sp-ark-bls12-381.workspace = true
+sp-crypto-ec-utils = { workspace = true, features = ["bls12-381"] }
 ark-bls12-381 = { workspace = true, features = ["curve"] }
 ark-serialize = { workspace = true, features = ["derive"] }
 ark-ff.workspace = true
@@ -64,7 +64,7 @@ std = [
 	"serde/std",
 	"serde_json/std",
 	"hex/std",
-	"sp-ark-bls12-381/std",
+	"sp-crypto-ec-utils/std",
 	"ark-bls12-381/std",
 	"ark-serialize/std",
 	"ark-ff/std",
diff --git a/pallets/drand/src/bls12_381.rs b/pallets/drand/src/bls12_381.rs
index 1415613ef6..e31118a3e4 100644
--- a/pallets/drand/src/bls12_381.rs
+++ b/pallets/drand/src/bls12_381.rs
@@ -16,7 +16,7 @@
 
 use ark_ec::pairing::Pairing;
 use ark_std::{Zero, ops::Neg};
-use sp_ark_bls12_381::{
+use sp_crypto_ec_utils::bls12_381::{
     Bls12_381 as Bls12_381Opt, G1Affine as G1AffineOpt, G2Affine as G2AffineOpt,
 };
 
diff --git a/pallets/drand/src/verifier.rs b/pallets/drand/src/verifier.rs
index e24b82003a..36c212181a 100644
--- a/pallets/drand/src/verifier.rs
+++ b/pallets/drand/src/verifier.rs
@@ -27,7 +27,7 @@ use ark_ec::{AffineRepr, hashing::HashToCurve};
 use ark_serialize::CanonicalSerialize;
 use codec::Decode;
 use sha2::{Digest, Sha256};
-use sp_ark_bls12_381::{G1Affine as G1AffineOpt, G2Affine as G2AffineOpt};
+use sp_crypto_ec_utils::bls12_381::{G1Affine as G1AffineOpt, G2Affine as G2AffineOpt};
 use tle::curves::drand::TinyBLS381;
 use w3f_bls::engine::EngineBLS;
 
diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index e3230ae540..f10d7c067b 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -237,7 +237,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     //   `spec_version`, and `authoring_version` are the same between Wasm and native.
     // This value is set to 100 to notify Polkadot-JS App (https://polkadot.js.org/apps) to use
     //   the compatible custom types.
-    spec_version: 353,
+    spec_version: 354,
     impl_version: 1,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 1,