diff --git a/pilot/configs/config.py b/pilot/configs/config.py
index 06b91e33b..72458f150 100644
--- a/pilot/configs/config.py
+++ b/pilot/configs/config.py
@@ -155,7 +155,7 @@ class Config(metaclass=Singleton):
         ### EMBEDDING Configuration
         self.EMBEDDING_MODEL = os.getenv("EMBEDDING_MODEL", "text2vec")
         self.KNOWLEDGE_CHUNK_SIZE = int(os.getenv("KNOWLEDGE_CHUNK_SIZE", 500))
-        self.KNOWLEDGE_SEARCH_TOP_SIZE = int(os.getenv("KNOWLEDGE_SEARCH_TOP_SIZE", 10))
+        self.KNOWLEDGE_SEARCH_TOP_SIZE = int(os.getenv("KNOWLEDGE_SEARCH_TOP_SIZE", 5))
         ### SUMMARY_CONFIG Configuration
         self.SUMMARY_CONFIG = os.getenv("SUMMARY_CONFIG", "VECTOR")