diff --git a/ethcore/src/client/client.rs b/ethcore/src/client/client.rs
index 13d678c14..ab1c21af1 100644
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -254,7 +254,7 @@ impl<V> Client<V> where V: Verifier {
 
 	/// This is triggered by a message coming from a block queue when the block is ready for insertion
 	pub fn import_verified_blocks(&self, io: &IoChannel<NetSyncMessage>) -> usize {
-		let max_blocks_to_import = 128;
+		let max_blocks_to_import = 64;
 
 		let mut imported_blocks = Vec::with_capacity(max_blocks_to_import);
 		let mut invalid_blocks = HashSet::new();
diff --git a/sync/src/chain.rs b/sync/src/chain.rs
index 6a54c648f..dde287a57 100644
--- a/sync/src/chain.rs
+++ b/sync/src/chain.rs
@@ -133,7 +133,7 @@ const NODE_DATA_PACKET: u8 = 0x0e;
 const GET_RECEIPTS_PACKET: u8 = 0x0f;
 const RECEIPTS_PACKET: u8 = 0x10;
 
-const CONNECTION_TIMEOUT_SEC: f64 = 10f64;
+const CONNECTION_TIMEOUT_SEC: f64 = 15f64;
 
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]
 /// Sync state