diff --git a/libs/community/langchain_community/graphs/neptune_graph.py b/libs/community/langchain_community/graphs/neptune_graph.py
index a6eb71ad69a..dd684cf4a64 100644
--- a/libs/community/langchain_community/graphs/neptune_graph.py
+++ b/libs/community/langchain_community/graphs/neptune_graph.py
@@ -22,7 +22,7 @@ class NeptuneQueryException(Exception):
 
 
 class BaseNeptuneGraph(ABC):
-    """Abstract base class for Neptune"""
+    """Abstract base class for Neptune."""
 
     @property
     def get_schema(self) -> str:
@@ -142,7 +142,7 @@ class BaseNeptuneGraph(ABC):
 class NeptuneAnalyticsGraph(BaseNeptuneGraph):
     """Neptune Analytics wrapper for graph operations.
 
-    Args:
+    Parameters:
         client: optional boto3 Neptune client
         credentials_profile_name: optional AWS profile name
         region_name: optional AWS region, e.g., us-west-2
@@ -272,14 +272,13 @@ class NeptuneAnalyticsGraph(BaseNeptuneGraph):
 class NeptuneGraph(BaseNeptuneGraph):
     """Neptune wrapper for graph operations.
 
-    Args:
+    Parameters:
         host: endpoint for the database instance
         port: port number for the database instance, default is 8182
         use_https: whether to use secure connection, default is True
         client: optional boto3 Neptune client
         credentials_profile_name: optional AWS profile name
         region_name: optional AWS region, e.g., us-west-2
-        service: optional service name, default is neptunedata
         sign: optional, whether to sign the request payload, default is True
 
     Example: