diff --git a/chain_service/repositories/chain.py b/chain_service/repositories/chain.py
index 98c15f0..ac3af11 100644
--- a/chain_service/repositories/chain.py
+++ b/chain_service/repositories/chain.py
@@ -1,3 +1,5 @@
+from loguru import logger
+
 import pymongo
 from uuid import UUID
 from typing import List
@@ -24,6 +26,10 @@ class ChainRepository:
         return TypeAdapter(List[Chain]).validate_python(chains)
 
     async def get_by_id(self, chain_id: str) -> Chain | None:
-        query = {"_id": UUID(chain_id)}
-        chain = await self.collection.find_one(query)
-        return Chain.model_validate(chain) if chain else None
+        try:
+            query = {"_id": UUID(chain_id)}
+            chain = await self.collection.find_one(query)
+            return Chain.model_validate(chain) if chain else None
+
+        except ValueError:
+            logger.error(f"Cannot convert {chain_id} to UUID")