diff --git a/chain_service/database/models/chain.py b/chain_service/database/models/chain.py
index b0daf97..0720426 100644
--- a/chain_service/database/models/chain.py
+++ b/chain_service/database/models/chain.py
@@ -23,7 +23,7 @@ Action = Annotated[
 class Chain(BaseMongoModel):
     name: Annotated[Optional[str], Field(default=None)]
     actions: Annotated[Optional[List[Action]], Field(default=[])]
-    created_at: Annotated[datetime, Field(default_factory=datetime.utcnow)]
+    last_modified: Annotated[datetime, Field(default_factory=datetime.utcnow)]
 
     class Config(BaseMongoModel.Config):
         pass