diff --git a/src/main/java/org/qortal/controller/Synchronizer.java b/src/main/java/org/qortal/controller/Synchronizer.java
index d7780909..1960d9a6 100644
--- a/src/main/java/org/qortal/controller/Synchronizer.java
+++ b/src/main/java/org/qortal/controller/Synchronizer.java
@@ -95,7 +95,7 @@ public class Synchronizer extends Thread {
 	private static Synchronizer instance;
 
 	public enum SynchronizationResult {
-		OK, NOTHING_TO_DO, GENESIS_ONLY, NO_COMMON_BLOCK, TOO_DIVERGENT, NO_REPLY, INFERIOR_CHAIN, INVALID_DATA, NO_BLOCKCHAIN_LOCK, REPOSITORY_ISSUE, SHUTTING_DOWN;
+		OK, NOTHING_TO_DO, GENESIS_ONLY, NO_COMMON_BLOCK, TOO_DIVERGENT, NO_REPLY, INFERIOR_CHAIN, INVALID_DATA, NO_BLOCKCHAIN_LOCK, REPOSITORY_ISSUE, SHUTTING_DOWN, CHAIN_TIP_TOO_OLD;
 	}
 
 	public static class NewChainTipEvent implements Event {
@@ -246,6 +246,12 @@ public class Synchronizer extends Thread {
 		// We may have added more inferior chain tips when comparing peers, so remove any peers that are currently on those chains
 		peers.removeIf(Controller.hasInferiorChainTip);
 
+		// Remove any peers that are no longer on a recent block since the last check
+		// Except for times when we're in recovery mode, in which case we need to keep them
+		if (!recoveryMode) {
+			peers.removeIf(Controller.hasNoRecentBlock);
+		}
+
 		final int peersRemoved = peersBeforeComparison - peers.size();
 		if (peersRemoved > 0 && peers.size() > 0)
 			LOGGER.debug(String.format("Ignoring %d peers on inferior chains. Peers remaining: %d", peersRemoved, peers.size()));
@@ -563,7 +569,7 @@ public class Synchronizer extends Thread {
 				// If our latest block is very old, it's best that we don't try and determine the best peers to sync to.
 				// This is because it can involve very large chain comparisons, which is too intensive.
 				// In reality, most forking problems occur near the chain tips, so we will reserve this functionality for those situations.
-				final Long minLatestBlockTimestamp = Controller.getMinimumLatestBlockTimestamp();
+				Long minLatestBlockTimestamp = Controller.getMinimumLatestBlockTimestamp();
 				if (minLatestBlockTimestamp == null)
 					return peers;
 
@@ -719,6 +725,7 @@ public class Synchronizer extends Thread {
 					LOGGER.debug(String.format("Listing peers with common block %.8s...", Base58.encode(commonBlockSummary.getSignature())));
 					for (Peer peer : peersSharingCommonBlock) {
 						final int peerHeight = peer.getChainTipData().getLastHeight();
+						final Long peerLastBlockTimestamp = peer.getChainTipData().getLastBlockTimestamp();
 						final int peerAdditionalBlocksAfterCommonBlock = peerHeight - commonBlockSummary.getHeight();
 						final CommonBlockData peerCommonBlockData = peer.getCommonBlockData();
 
@@ -729,6 +736,14 @@ public class Synchronizer extends Thread {
 							continue;
 						}
 
+						// If peer is our of date (since our last check), we should exclude it from this round
+						minLatestBlockTimestamp = Controller.getMinimumLatestBlockTimestamp();
+						if (peerLastBlockTimestamp == null || peerLastBlockTimestamp < minLatestBlockTimestamp) {
+							LOGGER.debug(String.format("Peer %s is out of date - removing it from this round", peer));
+							peers.remove(peer);
+							continue;
+						}
+
 						final List<BlockSummaryData> peerBlockSummariesAfterCommonBlock = peerCommonBlockData.getBlockSummariesAfterCommonBlock();
 						populateBlockSummariesMinterLevels(repository, peerBlockSummariesAfterCommonBlock);
 
@@ -1291,6 +1306,16 @@ public class Synchronizer extends Thread {
 				return SynchronizationResult.INVALID_DATA;
 			}
 
+			// Final check to make sure the peer isn't out of date (except for when we're in recovery mode)
+			if (!recoveryMode && peer.getChainTipData() != null) {
+				final Long minLatestBlockTimestamp = Controller.getMinimumLatestBlockTimestamp();
+				final Long peerLastBlockTimestamp = peer.getChainTipData().getLastBlockTimestamp();
+				if (peerLastBlockTimestamp == null || peerLastBlockTimestamp < minLatestBlockTimestamp) {
+					LOGGER.info(String.format("Peer %s is out of date, so abandoning sync attempt", peer));
+					return SynchronizationResult.CHAIN_TIP_TOO_OLD;
+				}
+			}
+
 			byte[] nextPeerSignature = peerBlockSignatures.get(0);
 			int nextHeight = height + 1;