diff --git a/bin/node/cli/src/chain_spec.rs b/bin/node/cli/src/chain_spec.rs
index ed323cd52e..50d5d0da90 100644
--- a/bin/node/cli/src/chain_spec.rs
+++ b/bin/node/cli/src/chain_spec.rs
@@ -325,7 +325,7 @@ fn pangolin_build_spec_genesis() -> pangolin_runtime::GenesisConfig {
 		darwinia_vesting: Default::default(),
 		pallet_sudo: pangolin_runtime::SudoConfig { key: root.clone() },
 		darwinia_crab_issuing: pangolin_runtime::DarwiniaCrabIssuingConfig { total_mapped_ring: BUNCH_OF_COINS },
-		darwinia_crab_backing: pangolin_runtime::CrabBackingConfig { backed_ring: BUNCH_OF_COINS },
+		darwinia_crab_backing: pangolin_runtime::DarwiniaCrabBackingConfig { backed_ring: BUNCH_OF_COINS },
 		darwinia_ethereum_relay: pangolin_runtime::EthereumRelayConfig {
 			genesis_header_info: (
 				vec![0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 86, 232, 31, 23, 27, 204, 85, 166, 255, 131, 69, 230, 146, 192, 248, 110, 91, 72, 224, 27, 153, 108, 173, 192, 1, 98, 47, 181, 227, 99, 180, 33, 29, 204, 77, 232, 222, 199, 93, 122, 171, 133, 181, 103, 182, 204, 212, 26, 211, 18, 69, 27, 148, 138, 116, 19, 240, 161, 66, 253, 64, 212, 147, 71, 128, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 33, 123, 11, 188, 251, 114, 226, 213, 126, 40, 243, 60, 179, 97, 185, 152, 53, 19, 23, 119, 85, 220, 63, 51, 206, 62, 112, 34, 237, 98, 183, 123, 86, 232, 31, 23, 27, 204, 85, 166, 255, 131, 69, 230, 146, 192, 248, 110, 91, 72, 224, 27, 153, 108, 173, 192, 1, 98, 47, 181, 227, 99, 180, 33, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 132, 160, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 36, 136, 0, 0, 0, 0, 0, 0, 0, 66, 1, 65, 148, 16, 35, 104, 9, 35, 224, 254, 77, 116, 163, 75, 218, 200, 20, 31, 37, 64, 227, 174, 144, 98, 55, 24, 228, 125, 102, 209, 202, 74, 45],
@@ -478,7 +478,7 @@ fn pangolin_development_genesis() -> pangolin_runtime::GenesisConfig {
 		darwinia_vesting: Default::default(),
 		pallet_sudo: pangolin_runtime::SudoConfig { key: root.clone() },
 		darwinia_crab_issuing: pangolin_runtime::DarwiniaCrabIssuingConfig { total_mapped_ring: BUNCH_OF_COINS },
-		darwinia_crab_backing: pangolin_runtime::CrabBackingConfig { backed_ring: BUNCH_OF_COINS },
+		darwinia_crab_backing: pangolin_runtime::DarwiniaCrabBackingConfig { backed_ring: BUNCH_OF_COINS },
 		darwinia_ethereum_relay: pangolin_runtime::EthereumRelayConfig {
 			genesis_header_info: (
 				vec![0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 86, 232, 31, 23, 27, 204, 85, 166, 255, 131, 69, 230, 146, 192, 248, 110, 91, 72, 224, 27, 153, 108, 173, 192, 1, 98, 47, 181, 227, 99, 180, 33, 29, 204, 77, 232, 222, 199, 93, 122, 171, 133, 181, 103, 182, 204, 212, 26, 211, 18, 69, 27, 148, 138, 116, 19, 240, 161, 66, 253, 64, 212, 147, 71, 128, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 33, 123, 11, 188, 251, 114, 226, 213, 126, 40, 243, 60, 179, 97, 185, 152, 53, 19, 23, 119, 85, 220, 63, 51, 206, 62, 112, 34, 237, 98, 183, 123, 86, 232, 31, 23, 27, 204, 85, 166, 255, 131, 69, 230, 146, 192, 248, 110, 91, 72, 224, 27, 153, 108, 173, 192, 1, 98, 47, 181, 227, 99, 180, 33, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 132, 160, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 36, 136, 0, 0, 0, 0, 0, 0, 0, 66, 1, 65, 148, 16, 35, 104, 9, 35, 224, 254, 77, 116, 163, 75, 218, 200, 20, 31, 37, 64, 227, 174, 144, 98, 55, 24, 228, 125, 102, 209, 202, 74, 45],
diff --git a/bin/node/runtime/pangolin/src/lib.rs b/bin/node/runtime/pangolin/src/lib.rs
index 04c5bda3b9..99ba231171 100644
--- a/bin/node/runtime/pangolin/src/lib.rs
+++ b/bin/node/runtime/pangolin/src/lib.rs
@@ -488,7 +488,7 @@ frame_support::construct_runtime! {
 		Multisig: pallet_multisig::{Pallet, Call, Storage, Event<T>} = 32,
 
 		DarwiniaCrabIssuing: darwinia_crab_issuing::{Pallet, Call, Storage, Config, Event<T>} = 33,
-		CrabBacking: darwinia_crab_backing::{Pallet, Storage, Config<T>} = 34,
+		DarwiniaCrabBacking: darwinia_crab_backing::{Pallet, Storage, Config<T>} = 34,
 
 		EthereumRelay: darwinia_ethereum_relay::{Pallet, Call, Storage, Config<T>, Event<T>} = 35,
 		EthereumBacking: darwinia_ethereum_backing::{Pallet, Call, Storage, Config<T>, Event<T>} = 36,
diff --git a/frame/bridge/crab/backing/src/lib.rs b/frame/bridge/crab/backing/src/lib.rs
index ad0a951d6c..743230b7e7 100644
--- a/frame/bridge/crab/backing/src/lib.rs
+++ b/frame/bridge/crab/backing/src/lib.rs
@@ -21,65 +21,69 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 
 pub mod weights;
-// --- darwinia ---
-pub use weights::WeightInfo;
-
-mod types {
-	// --- darwinia ---
-	#[cfg(feature = "std")]
-	use crate::*;
-
-	pub type AccountId<T> = <T as frame_system::Config>::AccountId;
-
-	#[cfg(feature = "std")]
-	pub type RingBalance<T> = <RingCurrency<T> as Currency<AccountId<T>>>::Balance;
-
-	#[cfg(feature = "std")]
-	type RingCurrency<T> = <T as Config>::RingCurrency;
-}
 
-// --- substrate ---
-use frame_support::{
-	decl_module, decl_storage,
-	traits::{Currency, Get},
-};
-use sp_runtime::{traits::AccountIdConversion, ModuleId};
-// --- darwinia ---
-use types::*;
+pub use pallet::*;
+pub use weights::WeightInfo;
 
-pub trait Config: frame_system::Config {
-	type ModuleId: Get<ModuleId>;
+#[frame_support::pallet]
+pub mod pallet {
+	pub mod types {
+		// --- darwinia ---
+		use super::*;
 
-	type RingCurrency: Currency<AccountId<Self>>;
+		// Generic types
+		pub type AccountId<T> = <T as frame_system::Config>::AccountId;
+		pub type RingBalance<T> = <RingCurrency<T> as Currency<AccountId<T>>>::Balance;
+		type RingCurrency<T> = <T as Config>::RingCurrency;
+	}
+	pub use types::*;
 
-	type WeightInfo: WeightInfo;
-}
+	// --- substrate ---
+	use frame_support::{
+		pallet_prelude::*,
+		traits::{Currency, Get},
+	};
+	use frame_system::pallet_prelude::*;
+	use sp_runtime::{traits::AccountIdConversion, ModuleId};
+	// --- darwinia ---
+	use crate::weights::WeightInfo;
 
-decl_storage! {
-	trait Store for Module<T: Config> as DarwiniaCrabBacking {}
+	#[pallet::config]
+	pub trait Config: frame_system::Config {
+		// --- substrate ---
+		type WeightInfo: WeightInfo;
+		// --- darwinia ---
+		#[pallet::constant]
+		type ModuleId: Get<ModuleId>;
+		type RingCurrency: Currency<AccountId<Self>>;
+	}
 
-	add_extra_genesis {
-		config(backed_ring): RingBalance<T>;
-		build(|config| {
+	#[pallet::genesis_config]
+	pub struct GenesisConfig<T: Config> {
+		pub backed_ring: RingBalance<T>,
+	}
+	#[cfg(feature = "std")]
+	impl<T: Config> Default for GenesisConfig<T> {
+		fn default() -> Self {
+			Self {
+				backed_ring: Default::default(),
+			}
+		}
+	}
+	#[pallet::genesis_build]
+	impl<T: Config> GenesisBuild<T> for GenesisConfig<T> {
+		fn build(&self) {
 			let _ = T::RingCurrency::make_free_balance_be(
-				&<Module<T>>::account_id(),
-				T::RingCurrency::minimum_balance() + config.backed_ring
+				&T::ModuleId::get().into_account(),
+				T::RingCurrency::minimum_balance() + self.backed_ring,
 			);
-		});
+		}
 	}
-}
 
-decl_module! {
-	pub struct Module<T: Config> for enum Call
-	where
-		origin: T::Origin
-	{
-		const ModuleId: ModuleId = T::ModuleId::get();
-	}
-}
-
-impl<T: Config> Module<T> {
-	pub fn account_id() -> T::AccountId {
-		T::ModuleId::get().into_account()
-	}
+	#[pallet::pallet]
+	pub struct Pallet<T>(_);
+	#[pallet::hooks]
+	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {}
+	#[pallet::call]
+	impl<T: Config> Pallet<T> {}
 }