diff --git a/src/main/java/org/qortal/controller/Synchronizer.java b/src/main/java/org/qortal/controller/Synchronizer.java
index 185e77a0..c393232d 100644
--- a/src/main/java/org/qortal/controller/Synchronizer.java
+++ b/src/main/java/org/qortal/controller/Synchronizer.java
@@ -49,7 +49,7 @@ public class Synchronizer {
 	private static final Logger LOGGER = LogManager.getLogger(Synchronizer.class);
 
 	/** Max number of new blocks we aim to add to chain tip in each sync round */
-	private static final int SYNC_BATCH_SIZE = 200; // XXX move to Settings?
+	private static final int SYNC_BATCH_SIZE = 1000; // XXX move to Settings?
 
 	/** Initial jump back of block height when searching for common block with peer */
 	private static final int INITIAL_BLOCK_STEP = 8;
diff --git a/src/main/java/org/qortal/network/message/Message.java b/src/main/java/org/qortal/network/message/Message.java
index d1546dce..07c44c7b 100644
--- a/src/main/java/org/qortal/network/message/Message.java
+++ b/src/main/java/org/qortal/network/message/Message.java
@@ -25,7 +25,7 @@ public abstract class Message {
 	private static final int MAGIC_LENGTH = 4;
 	private static final int CHECKSUM_LENGTH = 4;
 
-	private static final int MAX_DATA_SIZE = 1024 * 1024; // 1MB
+	private static final int MAX_DATA_SIZE = 10 * 1024 * 1024; // 10MB
 
 	@SuppressWarnings("serial")
 	public static class MessageException extends Exception {