diff --git a/auction/src/lib.rs b/auction/src/lib.rs
index e9c20c0655b2422b5efcf88f136193edae0533bc..5d9dba5e4c0f88d43b6a9de7b0cad69a99c7833a 100644
--- a/auction/src/lib.rs
+++ b/auction/src/lib.rs
@@ -37,9 +37,9 @@ type AuctionIdLinkedItem<T> = LinkedItem<<T as Trait>::AuctionId>;
 
 decl_storage! {
 	trait Store for Module<T: Trait> as Auction {
-		pub Auctions get(fn auctions): map hasher(blake2_256) T::AuctionId => Option<AuctionInfo<T::AccountId, T::Balance, T::BlockNumber>>;
+		pub Auctions get(fn auctions): map hasher(twox_64_concat) T::AuctionId => Option<AuctionInfo<T::AccountId, T::Balance, T::BlockNumber>>;
 		pub AuctionsIndex get(fn auctions_index): T::AuctionId;
-		pub AuctionEndTime get(fn auction_end_time): map hasher(blake2_256) (T::BlockNumber, Option<T::AuctionId>) => Option<AuctionIdLinkedItem<T>>;
+		pub AuctionEndTime get(fn auction_end_time): map hasher(twox_64_concat) (T::BlockNumber, Option<T::AuctionId>) => Option<AuctionIdLinkedItem<T>>;
 	}
 }
 
diff --git a/oracle/src/lib.rs b/oracle/src/lib.rs
index f9c9e9e8dd45e2a011625a42d07021ab4bc78278..5308b31114899ea0540f9eafdc2c981b3ec7a40e 100644
--- a/oracle/src/lib.rs
+++ b/oracle/src/lib.rs
@@ -49,9 +49,9 @@ pub trait Trait: frame_system::Trait {
 
 decl_storage! {
 	trait Store for Module<T: Trait> as Oracle {
-		pub RawValues get(raw_values): double_map hasher(blake2_256) T::OracleKey, hasher(blake2_256) T::AccountId => Option<TimestampedValueOf<T>>;
-		pub HasUpdate get(has_update): map hasher(blake2_256) T::OracleKey => bool;
-		pub Values get(values): map hasher(blake2_256) T::OracleKey => Option<TimestampedValueOf<T>>;
+		pub RawValues get(raw_values): double_map hasher(twox_64_concat) T::OracleKey, hasher(twox_64_concat) T::AccountId => Option<TimestampedValueOf<T>>;
+		pub HasUpdate get(has_update): map hasher(twox_64_concat) T::OracleKey => bool;
+		pub Values get(values): map hasher(twox_64_concat) T::OracleKey => Option<TimestampedValueOf<T>>;
 		HasDispatched: Vec<T::AccountId>;
 	}
 }
diff --git a/tokens/src/lib.rs b/tokens/src/lib.rs
index 88e14784764f998011a8e26a1635949db3e10f31..35d8e53698f90b6afbbaa2c8ab8d3f194cc5fe6e 100644
--- a/tokens/src/lib.rs
+++ b/tokens/src/lib.rs
@@ -57,10 +57,10 @@ decl_storage! {
 				})
 				.into_iter()
 				.collect::<Vec<_>>()
-		}): map hasher(blake2_256) T::CurrencyId => T::Balance;
+		}): map hasher(twox_64_concat) T::CurrencyId => T::Balance;
 
 		/// The balance of a token type under an account.
-		pub Balance get(fn balance): double_map hasher(blake2_256) T::CurrencyId, hasher(blake2_256) T::AccountId => T::Balance;
+		pub Balance get(fn balance): double_map hasher(twox_64_concat) T::CurrencyId, hasher(blake2_128_concat) T::AccountId => T::Balance;
 	}
 	add_extra_genesis {
 		config(endowed_accounts): Vec<(T::AccountId, T::CurrencyId, T::Balance)>;
diff --git a/vesting/src/lib.rs b/vesting/src/lib.rs
index 0a4bc69ec5de39119e838ae6931b3d780c13740f..c080592a8a3c2faf014e8485f4325a532e351c3a 100644
--- a/vesting/src/lib.rs
+++ b/vesting/src/lib.rs
@@ -80,7 +80,7 @@ decl_storage! {
 					(who.clone(), vec![VestingSchedule {start, period, period_count, per_period}])
 				)
 				.collect::<Vec<_>>()
-		}): map hasher(blake2_256) T::AccountId => Vec<VestingScheduleOf<T>>;
+		}): map hasher(blake2_128_concat) T::AccountId => Vec<VestingScheduleOf<T>>;
 	}
 
 	add_extra_genesis {