--- a/apps/blockchain-node/src/aitbc_chain/consensus/poa.py
+++ b/apps/blockchain-node/src/aitbc_chain/consensus/poa.py
@@ -171,7 +171,7 @@
             )
             
             # Broadcast the new block
-            gossip_broker.publish(
+            await gossip_broker.publish(
                 "blocks",
                 {
                     "height": block.height,
@@ -207,7 +207,7 @@
             session.commit()
             
             # Broadcast genesis block for initial sync
-            gossip_broker.publish(
+            await gossip_broker.publish(
                 "blocks",
                 {
                     "height": genesis.height,