diff --git a/Libplanet/Net/Swarm.cs b/Libplanet/Net/Swarm.cs
index fed037ebf20..4d2b51646ed 100644
--- a/Libplanet/Net/Swarm.cs
+++ b/Libplanet/Net/Swarm.cs
@@ -1452,8 +1452,6 @@ private async Task ProcessBlockHashes(
                     $"Append failed during {nameof(ProcessBlockHashes)}() due to exception: {e}");
                 throw;
             }
-
-            BroadcastBlocks(blocks);
         }
 
         private async Task<BlockChain<T>> SyncPreviousBlocksAsync(
@@ -1608,6 +1606,8 @@ CancellationToken cancellationToken
                     _blockChain.Swap(previousBlocks, render: true);
                     _logger.Debug("Swapping complete");
                 }
+
+                BroadcastBlocks(blocks);
             }
             else
             {