diff --git a/lightrag/operate.py b/lightrag/operate.py
index f2930f3d..15ba7696 100644
--- a/lightrag/operate.py
+++ b/lightrag/operate.py
@@ -2368,8 +2368,8 @@ async def kg_query(
         query_param.max_entity_tokens,
         query_param.max_relation_tokens,
         query_param.max_total_tokens,
-        query_param.hl_keywords or [],
-        query_param.ll_keywords or [],
+        hl_keywords_str,
+        ll_keywords_str,
         query_param.user_prompt or "",
         query_param.enable_rerank,
     )
@@ -2402,8 +2402,8 @@ async def kg_query(
                 "max_entity_tokens": query_param.max_entity_tokens,
                 "max_relation_tokens": query_param.max_relation_tokens,
                 "max_total_tokens": query_param.max_total_tokens,
-                "hl_keywords": query_param.hl_keywords or [],
-                "ll_keywords": query_param.ll_keywords or [],
+                "hl_keywords": hl_keywords_str,
+                "ll_keywords": ll_keywords_str,
                 "user_prompt": query_param.user_prompt or "",
                 "enable_rerank": query_param.enable_rerank,
             }
@@ -2491,8 +2491,6 @@ async def extract_keywords_only(
     args_hash = compute_args_hash(
         param.mode,
         text,
-        param.hl_keywords or [],
-        param.ll_keywords or [],
     )
     cached_result = await handle_cache(
         hashing_kv, args_hash, text, param.mode, cache_type="keywords"
@@ -2568,8 +2566,6 @@ async def extract_keywords_only(
                 "max_entity_tokens": param.max_entity_tokens,
                 "max_relation_tokens": param.max_relation_tokens,
                 "max_total_tokens": param.max_total_tokens,
-                "hl_keywords": param.hl_keywords or [],
-                "ll_keywords": param.ll_keywords or [],
                 "user_prompt": param.user_prompt or "",
                 "enable_rerank": param.enable_rerank,
             }
@@ -4165,8 +4161,6 @@ async def naive_query(
         query_param.max_entity_tokens,
         query_param.max_relation_tokens,
         query_param.max_total_tokens,
-        query_param.hl_keywords or [],
-        query_param.ll_keywords or [],
         query_param.user_prompt or "",
         query_param.enable_rerank,
     )
@@ -4197,8 +4191,6 @@ async def naive_query(
                 "max_entity_tokens": query_param.max_entity_tokens,
                 "max_relation_tokens": query_param.max_relation_tokens,
                 "max_total_tokens": query_param.max_total_tokens,
-                "hl_keywords": query_param.hl_keywords or [],
-                "ll_keywords": query_param.ll_keywords or [],
                 "user_prompt": query_param.user_prompt or "",
                 "enable_rerank": query_param.enable_rerank,
             }