diff --git a/Cargo.lock b/Cargo.lock
index 492739ac4e2f..9613844a9178 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -13249,7 +13249,6 @@ dependencies = [
  "sp-offchain",
  "sp-runtime",
  "sp-session",
- "sp-std 14.0.0",
  "sp-transaction-pool",
  "sp-version",
 ]
@@ -18219,7 +18218,6 @@ dependencies = [
  "scale-info",
  "serde",
  "sp-crypto-hashing",
- "sp-std 14.0.0",
  "static_assertions",
 ]
 
@@ -22265,7 +22263,6 @@ dependencies = [
  "scale-info",
  "sp-api",
  "sp-runtime",
- "sp-std 14.0.0",
  "sp-weights",
  "staging-xcm",
 ]
diff --git a/bridges/snowbridge/pallets/ethereum-client/src/mock.rs b/bridges/snowbridge/pallets/ethereum-client/src/mock.rs
index bd6144ebd8f9..e4375140e5ad 100644
--- a/bridges/snowbridge/pallets/ethereum-client/src/mock.rs
+++ b/bridges/snowbridge/pallets/ethereum-client/src/mock.rs
@@ -6,7 +6,7 @@ use frame_support::{derive_impl, dispatch::DispatchResult, parameter_types};
 use pallet_timestamp;
 use primitives::{Fork, ForkVersions};
 use snowbridge_core::inbound::{Log, Proof};
-use sp_std::default::Default;
+use core::default::Default;
 use std::{fs::File, path::PathBuf};
 
 type Block = frame_system::mocking::MockBlock<Test>;
diff --git a/polkadot/primitives/src/runtime_api.rs b/polkadot/primitives/src/runtime_api.rs
index d30a3b63b74f..2a3538a7a6f5 100644
--- a/polkadot/primitives/src/runtime_api.rs
+++ b/polkadot/primitives/src/runtime_api.rs
@@ -121,13 +121,9 @@ use crate::{
 	SessionIndex, SessionInfo, ValidatorId, ValidatorIndex, ValidatorSignature,
 };
 
-use alloc::{collections::btree_map::BTreeMap, vec::Vec};
+use alloc::{collections::{btree_map::BTreeMap, vec_deque::VecDeque}, vec::Vec};
 use polkadot_core_primitives as pcp;
 use polkadot_parachain_primitives::primitives as ppp;
-use sp_std::{
-	collections::{btree_map::BTreeMap, vec_deque::VecDeque},
-	prelude::*,
-};
 
 sp_api::decl_runtime_apis! {
 	/// The API for querying the state of parachains on-chain.
diff --git a/polkadot/runtime/common/src/paras_registrar/mod.rs b/polkadot/runtime/common/src/paras_registrar/mod.rs
index b522433017a0..08baac696927 100644
--- a/polkadot/runtime/common/src/paras_registrar/mod.rs
+++ b/polkadot/runtime/common/src/paras_registrar/mod.rs
@@ -35,7 +35,7 @@ use parity_scale_codec::{Decode, Encode};
 use primitives::{HeadData, Id as ParaId, ValidationCode, LOWEST_PUBLIC_ID, MIN_CODE_SIZE};
 use runtime_parachains::{
 	configuration, ensure_parachain,
-	paras::{self, ParaGenesisArgs, UpgradeStrategy},
+	paras::{self, OnNewHead, ParaGenesisArgs, ParaKind, UpgradeStrategy},
 	Origin, ParaLifecycle,
 };
 use scale_info::TypeInfo;
diff --git a/polkadot/runtime/parachains/src/assigner_on_demand/migration.rs b/polkadot/runtime/parachains/src/assigner_on_demand/migration.rs
index 8589ddc292bd..3a7a42983f1c 100644
--- a/polkadot/runtime/parachains/src/assigner_on_demand/migration.rs
+++ b/polkadot/runtime/parachains/src/assigner_on_demand/migration.rs
@@ -23,7 +23,7 @@ use frame_support::{
 
 mod v0 {
 	use super::*;
-	use sp_std::collections::vec_deque::VecDeque;
+	use alloc::collections::vec_deque::VecDeque;
 
 	#[derive(Encode, Decode, TypeInfo, Debug, PartialEq, Clone)]
 	pub(super) struct EnqueuedOrder {
@@ -50,7 +50,7 @@ mod v1 {
 	use crate::assigner_on_demand::LOG_TARGET;
 
 	/// Migration to V1
-	pub struct UncheckedMigrateToV1<T>(sp_std::marker::PhantomData<T>);
+	pub struct UncheckedMigrateToV1<T>(core::marker::PhantomData<T>);
 	impl<T: Config> UncheckedOnRuntimeUpgrade for UncheckedMigrateToV1<T> {
 		fn on_runtime_upgrade() -> Weight {
 			let mut weight: Weight = Weight::zero();
diff --git a/polkadot/runtime/parachains/src/inclusion/migration.rs b/polkadot/runtime/parachains/src/inclusion/migration.rs
index 5f35680ee694..6750669711bc 100644
--- a/polkadot/runtime/parachains/src/inclusion/migration.rs
+++ b/polkadot/runtime/parachains/src/inclusion/migration.rs
@@ -75,7 +75,7 @@ mod v1 {
 	};
 	use frame_support::{traits::UncheckedOnRuntimeUpgrade, weights::Weight};
 	use sp_core::Get;
-	use sp_std::{collections::vec_deque::VecDeque, vec::Vec};
+	use alloc::{collections::vec_deque::VecDeque, vec::Vec};
 
 	#[cfg(feature = "try-runtime")]
 	use frame_support::{
@@ -85,7 +85,7 @@ mod v1 {
 	#[cfg(feature = "try-runtime")]
 	use parity_scale_codec::{Decode, Encode};
 
-	pub struct VersionUncheckedMigrateToV1<T>(sp_std::marker::PhantomData<T>);
+	pub struct VersionUncheckedMigrateToV1<T>(core::marker::PhantomData<T>);
 
 	impl<T: Config> UncheckedOnRuntimeUpgrade for VersionUncheckedMigrateToV1<T> {
 		#[cfg(feature = "try-runtime")]
diff --git a/polkadot/xcm/xcm-fee-payment-runtime-api/Cargo.toml b/polkadot/xcm/xcm-fee-payment-runtime-api/Cargo.toml
index 30c7c0bac14f..a240f07c6b9e 100644
--- a/polkadot/xcm/xcm-fee-payment-runtime-api/Cargo.toml
+++ b/polkadot/xcm/xcm-fee-payment-runtime-api/Cargo.toml
@@ -20,7 +20,6 @@ scale-info = { version = "2.11.1", default-features = false, features = [
 	"derive",
 	"serde",
 ] }
-sp-std = { path = "../../../substrate/primitives/std", default-features = false }
 sp-runtime = { path = "../../../substrate/primitives/runtime", default-features = false }
 sp-weights = { path = "../../../substrate/primitives/weights", default-features = false }
 xcm = { package = "staging-xcm", path = "../", default-features = false }
@@ -34,7 +33,6 @@ std = [
 	"scale-info/std",
 	"sp-api/std",
 	"sp-runtime/std",
-	"sp-std/std",
 	"sp-weights/std",
 	"xcm/std",
 ]
diff --git a/polkadot/xcm/xcm-fee-payment-runtime-api/src/lib.rs b/polkadot/xcm/xcm-fee-payment-runtime-api/src/lib.rs
index 20bf9236f1fb..9f0edddeb4ee 100644
--- a/polkadot/xcm/xcm-fee-payment-runtime-api/src/lib.rs
+++ b/polkadot/xcm/xcm-fee-payment-runtime-api/src/lib.rs
@@ -18,9 +18,12 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
+extern crate alloc;
+
 use codec::{Decode, Encode};
 use frame_support::pallet_prelude::TypeInfo;
-use sp_std::vec::Vec;
+#[cfg(not(feature = "std"))]
+use alloc::vec::Vec;
 use sp_weights::Weight;
 use xcm::{Version, VersionedAssetId, VersionedAssets, VersionedLocation, VersionedXcm};
 
diff --git a/substrate/frame/examples/single-block-migrations/src/migrations/v1.rs b/substrate/frame/examples/single-block-migrations/src/migrations/v1.rs
index f33685bf8d49..94c85ab807b9 100644
--- a/substrate/frame/examples/single-block-migrations/src/migrations/v1.rs
+++ b/substrate/frame/examples/single-block-migrations/src/migrations/v1.rs
@@ -41,7 +41,7 @@ mod v0 {
 ///
 /// In this migration, update the on-chain storage for the pallet to reflect the new storage
 /// layout.
-pub struct InnerMigrateV0ToV1<T: crate::Config>(sp_std::marker::PhantomData<T>);
+pub struct InnerMigrateV0ToV1<T: crate::Config>(core::marker::PhantomData<T>);
 
 impl<T: crate::Config> UncheckedOnRuntimeUpgrade for InnerMigrateV0ToV1<T> {
 	/// Return the existing [`crate::Value`] so we can check that it was correctly set in
diff --git a/substrate/primitives/arithmetic/Cargo.toml b/substrate/primitives/arithmetic/Cargo.toml
index 16eae43c73fa..e94f63fd5018 100644
--- a/substrate/primitives/arithmetic/Cargo.toml
+++ b/substrate/primitives/arithmetic/Cargo.toml
@@ -26,7 +26,6 @@ num-traits = { version = "0.2.17", default-features = false }
 scale-info = { version = "2.11.1", default-features = false, features = ["derive"] }
 serde = { features = ["alloc", "derive"], optional = true, workspace = true }
 static_assertions = "1.1.0"
-sp-std = { path = "../std", default-features = false }
 docify = "0.2.8"
 
 [dev-dependencies]
@@ -43,7 +42,6 @@ std = [
 	"scale-info/std",
 	"serde/std",
 	"sp-crypto-hashing/std",
-	"sp-std/std",
 ]
 # Serde support without relying on std features.
 serde = ["dep:serde", "scale-info/serde"]
diff --git a/substrate/primitives/core/src/crypto_bytes.rs b/substrate/primitives/core/src/crypto_bytes.rs
index ee5f3482f743..e5130e6d5007 100644
--- a/substrate/primitives/core/src/crypto_bytes.rs
+++ b/substrate/primitives/core/src/crypto_bytes.rs
@@ -34,7 +34,7 @@ use crate::crypto::Ss58Codec;
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
 
 #[cfg(all(not(feature = "std"), feature = "serde"))]
-use sp_std::alloc::{format, string::String};
+use alloc::{format, string::String};
 
 pub use public_bytes::*;
 pub use signature_bytes::*;
@@ -256,7 +256,7 @@ mod public_bytes {
 
 	impl<const N: usize, SubTag> Public for PublicBytes<N, SubTag> where Self: CryptoType {}
 
-	impl<const N: usize, SubTag> sp_std::fmt::Debug for PublicBytes<N, SubTag>
+	impl<const N: usize, SubTag> core::fmt::Debug for PublicBytes<N, SubTag>
 	where
 		Self: CryptoType,
 	{
@@ -267,7 +267,7 @@ mod public_bytes {
 		}
 
 		#[cfg(not(feature = "std"))]
-		fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
+		fn fmt(&self, _: &mut core::fmt::Formatter) -> core::fmt::Result {
 			Ok(())
 		}
 	}
@@ -362,17 +362,17 @@ mod signature_bytes {
 		}
 	}
 
-	impl<const N: usize, SubTag> sp_std::fmt::Debug for SignatureBytes<N, SubTag>
+	impl<const N: usize, SubTag> core::fmt::Debug for SignatureBytes<N, SubTag>
 	where
 		Self: CryptoType,
 	{
 		#[cfg(feature = "std")]
-		fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
+		fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
 			write!(f, "{}", crate::hexdisplay::HexDisplay::from(&&self.0[..]))
 		}
 
 		#[cfg(not(feature = "std"))]
-		fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
+		fn fmt(&self, _: &mut core::fmt::Formatter) -> core::fmt::Result {
 			Ok(())
 		}
 	}
diff --git a/substrate/primitives/core/src/ecdsa.rs b/substrate/primitives/core/src/ecdsa.rs
index da71a52d837d..ffb9fa894ca0 100644
--- a/substrate/primitives/core/src/ecdsa.rs
+++ b/substrate/primitives/core/src/ecdsa.rs
@@ -35,8 +35,6 @@ use secp256k1::{
 	ecdsa::{RecoverableSignature, RecoveryId},
 	Message, PublicKey, SecretKey, SECP256K1,
 };
-#[cfg(not(feature = "std"))]
-use alloc::vec::Vec;
 
 /// An identifier used to match public keys against ecdsa keys
 pub const CRYPTO_ID: CryptoTypeId = CryptoTypeId(*b"ecds");
diff --git a/templates/parachain/runtime/src/apis.rs b/templates/parachain/runtime/src/apis.rs
index 74c7476e1520..80486e38d411 100644
--- a/templates/parachain/runtime/src/apis.rs
+++ b/templates/parachain/runtime/src/apis.rs
@@ -37,7 +37,8 @@ use sp_runtime::{
 	transaction_validity::{TransactionSource, TransactionValidity},
 	ApplyExtrinsicResult,
 };
-use sp_std::prelude::Vec;
+#[cfg(not(feature = "std"))]
+use alloc::vec::Vec;
 use sp_version::RuntimeVersion;
 
 // Local module imports
@@ -80,7 +81,7 @@ impl_runtime_apis! {
 			Runtime::metadata_at_version(version)
 		}
 
-		fn metadata_versions() -> sp_std::vec::Vec<u32> {
+		fn metadata_versions() -> alloc::vec::Vec<u32> {
 			Runtime::metadata_versions()
 		}
 	}
@@ -238,7 +239,7 @@ impl_runtime_apis! {
 
 			use frame_system_benchmarking::Pallet as SystemBench;
 			impl frame_system_benchmarking::Config for Runtime {
-				fn setup_set_code_requirements(code: &sp_std::vec::Vec<u8>) -> Result<(), BenchmarkError> {
+				fn setup_set_code_requirements(code: &alloc::vec::Vec<u8>) -> Result<(), BenchmarkError> {
 					ParachainSystem::initialize_for_set_code_benchmark(code.len() as u32);
 					Ok(())
 				}