diff --git a/rag/llm/embedding_model.py b/rag/llm/embedding_model.py
index fac954da7..221fea198 100644
--- a/rag/llm/embedding_model.py
+++ b/rag/llm/embedding_model.py
@@ -155,6 +155,7 @@ class QWenEmbed(Base):
 
     def encode(self, texts: list, batch_size=10):
         import dashscope
+        batch_size = min(batch_size, 4)
         try:
             res = []
             token_count = 0