diff --git a/hildr-node/src/main/java/io/optimism/driver/EngineDriver.java b/hildr-node/src/main/java/io/optimism/driver/EngineDriver.java
index ff644ae5..ef662a8c 100644
--- a/hildr-node/src/main/java/io/optimism/driver/EngineDriver.java
+++ b/hildr-node/src/main/java/io/optimism/driver/EngineDriver.java
@@ -315,6 +315,7 @@ private void updateSafeHead(BlockInfo newHead, Epoch newEpoch, boolean reorgUnsa
             this.safeEpoch = newEpoch;
         }
         if (reorgUnsafe || this.safeHead.number().compareTo(this.unsafeHead.number()) > 0) {
+            LOGGER.info("update unsafe head number({}) to new head({})", this.unsafeHead.number(), newHead.number());
             this.unsafeHead = newHead;
         }
     }