diff --git a/pbtc/util.rs b/pbtc/util.rs
index 23d93bdf..79579999 100644
--- a/pbtc/util.rs
+++ b/pbtc/util.rs
@@ -5,7 +5,7 @@ use chain::RepresentH256;
 use {db, APP_INFO};
 use config::Config;
 
-pub fn open_db(_cfg: &Config) -> Arc<db::Store> {
+pub fn open_db(_cfg: &Config) -> db::SharedStore {
 	let db_path = app_dir(AppDataType::UserData, &APP_INFO, "db").expect("Failed to get app dir");
 	Arc::new(db::Storage::new(db_path).expect("Failed to open database"))
 }
@@ -16,7 +16,7 @@ pub fn node_table_path() -> PathBuf {
 	node_table
 }
 
-pub fn init_db(cfg: &Config, db: &Arc<db::Store>) -> Result<(), String> {
+pub fn init_db(cfg: &Config, db: &db::SharedStore) -> Result<(), String> {
 	// insert genesis block if db is empty
 	let genesis_block = cfg.magic.genesis_block();
 	match db.block_hash(0) {
diff --git a/sync/src/blocks_writer.rs b/sync/src/blocks_writer.rs
index f0cc0cb8..3f2f6816 100644
--- a/sync/src/blocks_writer.rs
+++ b/sync/src/blocks_writer.rs
@@ -10,7 +10,7 @@ pub struct BlocksWriter {
 }
 
 impl BlocksWriter {
-	pub fn new(storage: Arc<db::Store>) -> BlocksWriter {
+	pub fn new(storage: db::SharedStore) -> BlocksWriter {
 		BlocksWriter {
 			storage: storage.clone(),
 			verifier: ChainVerifier::new(storage),
diff --git a/sync/src/lib.rs b/sync/src/lib.rs
index 94f9f955..c03f214f 100644
--- a/sync/src/lib.rs
+++ b/sync/src/lib.rs
@@ -49,12 +49,12 @@ pub enum Error {
 }
 
 /// Create blocks writer.
-pub fn create_sync_blocks_writer(db: Arc<db::Store>) -> blocks_writer::BlocksWriter {
+pub fn create_sync_blocks_writer(db: db::SharedStore) -> blocks_writer::BlocksWriter {
 	blocks_writer::BlocksWriter::new(db)
 }
 
 /// Create inbound synchronization connections factory for given `db`.
-pub fn create_sync_connection_factory(handle: &Handle, consensus_params: ConsensusParams, db: Arc<db::Store>) -> p2p::LocalSyncNodeRef {
+pub fn create_sync_connection_factory(handle: &Handle, consensus_params: ConsensusParams, db: db::SharedStore) -> p2p::LocalSyncNodeRef {
 	use synchronization_chain::Chain as SyncChain;
 	use synchronization_executor::LocalSynchronizationTaskExecutor as SyncExecutor;
 	use local_node::LocalNode as SyncNode;
diff --git a/sync/src/synchronization_chain.rs b/sync/src/synchronization_chain.rs
index 4ef19907..8a0d2f6e 100644
--- a/sync/src/synchronization_chain.rs
+++ b/sync/src/synchronization_chain.rs
@@ -101,7 +101,7 @@ pub struct Chain {
 	/// Best storage block (stored for optimizations)
 	best_storage_block: db::BestBlock,
 	/// Local blocks storage
-	storage: Arc<db::Store>,
+	storage: db::SharedStore,
 	/// In-memory queue of blocks hashes
 	hash_chain: HashQueueChain,
 	/// In-memory queue of blocks headers
@@ -134,7 +134,7 @@ impl BlockState {
 
 impl Chain {
 	/// Create new `Chain` with given storage
-	pub fn new(storage: Arc<db::Store>) -> Self {
+	pub fn new(storage: db::SharedStore) -> Self {
 		// we only work with storages with genesis block
 		let genesis_block_hash = storage.block_hash(0)
 			.expect("storage with genesis block is required");
@@ -165,7 +165,7 @@ impl Chain {
 	}
 
 	/// Get storage
-	pub fn storage(&self) -> Arc<db::Store> {
+	pub fn storage(&self) -> db::SharedStore {
 		self.storage.clone()
 	}
 
@@ -666,6 +666,7 @@ mod tests {
 	use primitives::hash::H256;
 	use devtools::RandomTempPath;
 	use test_data;
+	use db::BlockStapler;
 
 	#[test]
 	fn chain_empty() {
diff --git a/sync/src/synchronization_client.rs b/sync/src/synchronization_client.rs
index 601fbb89..5946ecef 100644
--- a/sync/src/synchronization_client.rs
+++ b/sync/src/synchronization_client.rs
@@ -1114,12 +1114,12 @@ pub mod tests {
 	use db;
 	use devtools::RandomTempPath;
 
-	fn create_disk_storage() -> Arc<db::Store> {
+	fn create_disk_storage() -> db::SharedStore {
 		let path = RandomTempPath::create_dir();
 		Arc::new(db::Storage::new(path.as_path()).unwrap())
 	}
 
-	fn create_sync(storage: Option<Arc<db::Store>>) -> (Core, Handle, Arc<Mutex<DummyTaskExecutor>>, ChainRef, Arc<Mutex<SynchronizationClient<DummyTaskExecutor>>>) {
+	fn create_sync(storage: Option<db::SharedStore>) -> (Core, Handle, Arc<Mutex<DummyTaskExecutor>>, ChainRef, Arc<Mutex<SynchronizationClient<DummyTaskExecutor>>>) {
 		let event_loop = event_loop();
 		let handle = event_loop.handle();
 		let storage = match storage {