diff --git a/apps/blockchain-node/src/aitbc_chain/main.py b/apps/blockchain-node/src/aitbc_chain/main.py
index 33ab9caf..77d2156c 100755
--- a/apps/blockchain-node/src/aitbc_chain/main.py
+++ b/apps/blockchain-node/src/aitbc_chain/main.py
@@ -72,7 +72,7 @@ def _load_private_key_from_keystore(keystore_dir: Path, password: str, target_ad
             logger.info(f"Successfully decrypted keystore file: {kf.name}")
             return private_bytes
         except Exception as e:
-            logger.warning(f"Failed to decrypt keystore file {kf.name}: {e}")
+            logger.warning(f"Failed to decrypt keystore file {kf.name}: {type(e).__name__}: {str(e)}")
             continue
     return None